Most travelers planning a Bangkok to Khao Yai private transfer spend their time thinking about what to do at their destination. Very few spend any time thinking about the vehicle. That is where the transfer tends to go wrong. Not in the road itself, which is straightforward, but in the mismatch between the group size, the luggage volume, and whatever car shows up at the hotel entrance.
A sedan booked for three passengers with full overnight bags is a problem that becomes apparent about forty minutes into a three-hour drive. A minivan booked for two people is comfortable, but rarely the most efficient use of the transfer budget. And departing Bangkok at nine in the morning for a park that rewards arrivals at eight is a timing decision that reshapes the entire day.
This guide covers the Bangkok to Khao Yai private transfer, including operational details: the correct vehicle for the group configuration, the route and its real-world timing, departure windows, what happens at the park entrance, and what to confirm with any operator before the booking is finalized.
The direct answer: A Bangkok to Khao Yai private transfer takes between 2.5 and 3.5 hours, depending on departure time and Bangkok traffic. The standard route follows Highway 1 north through Rangsit and Saraburi, then Highway 2 east through Pak Chong to the park perimeter. For one to two passengers with light luggage, a sedan is adequate. For two to three passengers with full overnight bags, an SUV is the practical choice. For four or more passengers, a Toyota Commuter or an equivalent minivan is the right vehicle. Departing Bangkok before 07:00 is the single decision that most improves the day at both ends.
Quick Picks: Bangkok to Khao Yai Private Transfer by Traveler Type

- Solo traveler or couple, light luggage, day trip: Standard sedan, depart by 06:30, confirm return departure time before leaving Bangkok
- Couple or two travelers, overnight luggage: SUV or premium MPV, depart by 06:00 to 07:00 for a usable morning wildlife window
- Family or group of four to six: Toyota Commuter or similar minivan, confirm luggage compartment capacity before booking
- Small group wanting elevated comfort on a 3-hour drive: Toyota Alphard or Mercedes V-Class, budget accordingly, book at least one week in advance
- Travelers departing from Suvarnabhumi or Don Mueang: Arrange the Khao Yai transfer and airport transfer as a single coordinated sequence to avoid timing confusion at the departure point
Transfer Options: At a Glance
| Vehicle | Capacity | Boot Space | Estimated Cost (one way) | Best For |
|---|---|---|---|---|
| Standard sedan (Camry, Altis) | 1 to 3 passengers | Limited: 1 to 2 bags | 2,000 to 2,800 THB | Solo or couple, light luggage |
| SUV (Fortuner, Pajero Sport) | 2 to 4 passengers | Moderate: 3 to 4 bags | 2,800 to 3,800 THB | Couples with luggage, small families |
| Premium MPV (Toyota Alphard) | 2 to 4 passengers | Moderate | 3,500 to 5,000 THB | Comfort priority on a long road journey |
| Minivan (Toyota Commuter, Hiace) | 5 to 9 passengers | Large: 6 to 8 bags | 3,500 to 5,500 THB | Families, groups, heavy luggage |
| Luxury vehicle (Mercedes V-Class, BMW 7) | 2 to 6 passengers | Varies | 6,000 to 10,000+ THB | Consistent luxury standard throughout |
All figures are estimates. Costs vary by operator, season, vehicle availability, and whether a return trip or waiting fee is included. Confirm the full rate structure before confirming any booking.
Decision Shortcut
Choose a sedan or SUV if your group is two to three people and the priority is getting to the park efficiently without overspending on transport.
Choose a minivan if you are traveling as a family or group of four or more, have significant luggage, or want a single vehicle that handles everyone and everything without a second coordination step.
Bangkok to Khao Yai Private Transfer Route: What the Road Actually Looks Like

The route is not complicated. There are essentially two options, and the choice between them is mostly determined by where in Bangkok you are starting from and the traffic conditions at departure time.
Highway 1 via Rangsit and Saraburi is the standard route. You head north out of Bangkok on Phahon Yothin Road or the expressway, pass through Rangsit, continue north toward Saraburi, and then turn east on Highway 2 toward Pak Chong. From Pak Chong, the road climbs into the higher terrain that marks the edge of the Khao Yai National Park plateau. Total distance from central Bangkok: approximately 190-200 km, depending on the starting point. Under clear conditions, this is a 2.5 to 3-hour drive.
The Saraburi interchange is the only point on this route where delays can compound quickly if traffic builds. On a weekday morning departure before 07:00, it is a non-issue. On a weekend morning between 08:00 and 10:00, it is worth factoring into your timing estimate.
Highway 304 via Nakhon Ratchasima is the longer alternative, used when Highway 1 is congested or when the traveler is connecting from the eastern side of Bangkok or directly from Suvarnabhumi Airport. It adds a few kilometers to the total distance but can save time on a congested departure morning when the Bangkok northern corridor is already backed up past Don Mueang.
The road from Pak Chong to the park entrance deserves a specific note. It climbs steadily through a mixture of resort development, vineyard properties, and forest cover before reaching the Khao Yai National Park boundary. This stretch is not a highway. It is a two-lane road with mixed traffic that adds 20 to 30 minutes, depending on conditions and your specific destination within the Khao Yai perimeter.
Where this fits in your trip: Bangkok hotel or Suvarnabhumi Airport → Highway 1 north → Saraburi interchange → Highway 2 east → Pak Chong town → Khao Yai National Park entrance or resort property
Departure Timing: When You Leave Bangkok Determines Everything
This is not a secondary logistics question. The departure window from Bangkok is the decision that shapes the quality of the entire day at Khao Yai.
Departing before 07:00 ensures a clean run through Bangkok before the morning congestion builds up past the Don Mueang and Rangsit corridors. Arrival at Pak Chong is around 09:00 to 09:30, with park entry possible before 10:00. The morning wildlife window from 06:00 to 09:00 is already partially closed by this point, but this is a realistic same-day arrival that still allows a substantive park morning.
Departing at 06:00 or earlier is the correct structure for day-trippers who want any meaningful wildlife time. Arriving at the park entrance by 08:30 and being on-road inside the park by 09:00 puts you inside the closing edge of the morning window. It is tight. An overnight stay the previous evening in Pak Chong or at a property near the park entrance solves this entirely.
Departing between 09:00 and 10:00 is manageable in terms of traffic but results in a midday park arrival, which is the least rewarding window for wildlife. The heat between 11:00 and 14:00 suppresses animal movement, and visitor numbers in the park peak in the same window. This departure time suits travelers who want a vineyard lunch and an afternoon in the park rather than an early wildlife drive.
Departing after 14:00 makes sense only if the goal is a resort check-in and a relaxed first evening, with the park activity structured around the following morning. It is not a day-trip option.
Weekend and public holiday considerations. The Bangkok-to-Pak Chong road on Saturday and Sunday mornings, particularly during Thai long weekends, carries significantly heavier traffic than on midweek. The Rangsit and Pathum Thani sections of Highway 1 can back up for 30 to 60 minutes during peak departure windows from around 07:00 to 09:00. If your transfer falls on a weekend, build this into the schedule or push the departure to 06:00 or earlier to clear the city before the congestion forms.
Vehicle Options for a Bangkok to Khao Yai Private Transfer
Standard Sedan

The standard sedan option on this route is typically a Toyota Camry, Altis, or a similar model. It is adequate for one to two passengers with a single bag each. It is not adequate for two passengers with full overnight luggage, plus camera equipment, park layers, and other items that tend to accumulate on a multi-night trip outside Bangkok.
The boot space in a standard sedan comfortably holds one to two medium-sized cases. Three bags are a squeeze. Four is a problem.
For solo travelers or couples traveling genuinely light on a day trip, the sedan is the right call: it is the most cost-efficient vehicle on this route, it handles the highway comfortably, and there is no reason to pay for a larger vehicle if the luggage fits.
Trade-off: Comfort on a three-hour road trip in a standard sedan is fine for two passengers. It is not what most travelers would describe as the best use of a long drive on a luxury itinerary. If the vehicle class matters, step up.
SUV

The Toyota Fortuner, Mitsubishi Pajero Sport, or equivalent is the default recommendation for most private transfers from Bangkok to Khao Yai. It carries two to four passengers with full overnight luggage without the boot-space anxiety of a sedan. The elevated seating position is more comfortable on a road that transitions from expressway to rural highway. And for a three-hour drive in each direction, the difference in ride quality is perceptible.
For couples on an overnight trip, the SUV is the practical vehicle without the group-transport feel of a minivan. For small families of three, it handles everyone and their bags without a second vehicle.
Trade-off: The cost premium over a sedan is approximately 800 to 1,000 THB one way, which over two legs adds around 1,600 to 2,000 THB to the total. For most travelers on a structured luxury itinerary, that is not a meaningful number relative to the overall trip spend.
Toyota Alphard or Premium MPV

The Toyota Alphard sits between the SUV and the minivan in capacity, but above both in cabin quality. It is the vehicle most frequently used on the Bangkok-to-Khao Yai route by travelers who want a consistent standard throughout, from airport pickup to hotel arrival to park transfer.
Seating capacity is typically four passengers with full luggage, and the interior is meaningfully more refined than that of a standard SUV. On a three-hour road trip, this matters more than the cost difference suggests.
If the transfer is part of a wider itinerary, structure the full sequence using the Thailand luxury travel overview before confirming vehicles and timing. The vehicle class decision compounds across multiple legs, and getting the baseline right at the Bangkok end avoids adjustment mid-trip.
Operators who can confirm a Toyota Alphard for this route require advance booking of at least three to five days during normal periods. During Thai public holidays, peak season weekends, and December through January, availability narrows considerably.
Trade-off: Premium MPVs on this route are not always available from smaller local operators. Sourcing one may require working with a Bangkok-based operator rather than a Pak Chong-based one, which adds a coordination step but yields a more reliable vehicle quality outcome.
Minivan (Toyota Commuter or Hiace)

For groups of five or more, the minivan is the correct answer. It carries passengers, luggage, and equipment without the compromises that smaller vehicles impose on larger groups. The Toyota Commuter is the standard vehicle on this route for group transfers: it seats up to nine passengers, the rear luggage compartment is genuinely usable, and the running cost per person with four or more passengers is often more favorable than two separate SUVs.
The comfort ceiling in a minivan for over three hours is real. The seating is not as refined as that of an Alphard, and the middle rows in a full Commuter on a long highway run are the least comfortable positions. For a family of four or a group of six, this is an acceptable trade-off. For a couple who have booked a minivan because it was the first available option on a booking site, it is an unnecessarily large vehicle for an unnecessarily long ride.
Trade-off: The minivan is a group vehicle. For two or three passengers, it offers no meaningful advantage over an SUV and provides a noticeably less comfortable ride.
Luxury Vehicle Options

Mercedes V-Class, BMW 7 Series, and equivalent vehicles are available for this route through premium Bangkok-based operators. They are the right choice for travelers for whom the transfer is part of the experience rather than a logistics step between two more important things.
Cost ranges from approximately 6,000 to 10,000+ THB one way, depending on the vehicle and operator. For a group of four passengers, the per-head cost is comparable to a premium Alphard transfer, with a meaningfully higher level of finish quality. For a couple, the economics are harder to justify unless the vehicle class is an intentional part of the trip's structure.
Trade-off: Luxury vehicles on this route require a Bangkok-based operator with confirmed availability, typically at least five to seven days in advance. They are not walk-up options, and they are not available from most Pak Chong-based operators.
Khao Yai Park Entrance: What Happens When You Arrive

The Khao Yai National Park main entrance is located approximately 14 km north of Pak Chong on Route 3052. Travelers entering the park by private vehicle pay both a visitor entry fee and a vehicle fee at the entrance gate.
As of the current Department of National Parks, Wildlife and Plant Conservation rates, foreign national entry fees are 400 THB per person for adults. Vehicle fees apply separately. Confirm the current fee structure with your operator before arrival, as conservation fee schedules are reviewed periodically, and figures quoted in any third-party guide may have been updated since publication.
Many resort properties associated with Khao Yai, including the vineyard hotels and several of the more prominent luxury options, lie outside the national park boundary on the Pak Chong side. Guests staying at these properties do not pay the national park entry fee for their accommodation stay. They pay only when entering the park for specific activities such as wildlife drives or waterfall visits. This is a meaningful cost and logistical difference for travelers on multi-night stays who are not spending every day inside the park.
Your driver does not need park credentials to enter with a private vehicle. However, if you are engaging a combined transfer-and-park guide service, confirm that the guide holds a valid park operating license before the booking is confirmed. Licensed guiding activity within Khao Yai National Park is regulated by the DNP, and operators without the appropriate credentials are not permitted to guide within the park boundary.
Cost Estimates: Bangkok to Khao Yai Private Transfer
| Vehicle Type | One Way (estimated) | Return (estimated) | Day Trip with Waiting Fee |
|---|---|---|---|
| Standard sedan | 2,000 to 2,800 THB | 4,000 to 5,600 THB | 4,500 to 6,500 THB |
| SUV | 2,800 to 3,800 THB | 5,600 to 7,600 THB | 6,000 to 8,500 THB |
| Premium MPV (Alphard) | 3,500 to 5,000 THB | 7,000 to 10,000 THB | 8,000 to 12,000 THB |
| Minivan (Commuter) | 3,500 to 5,500 THB | 7,000 to 11,000 THB | 8,000 to 13,000 THB |
| Luxury vehicle | 6,000 to 10,000+ THB | 12,000 to 20,000+ THB | On request |
All figures are estimates based on current operator data and traveler-reported rates as of 2026. Costs vary by operator, vehicle availability, departure point within Bangkok, and seasonal demand. Confirm the full rate structure, including waiting fees and return timing windows, before confirming any booking.
Waiting fees apply when the driver remains in the Pak Chong area during a day trip rather than returning to Bangkok. This is the standard structure for day trips. Typical waiting fees run from 500 to 1,200 THB, depending on the operator and duration. Some operators quote a flat all-in day rate for the vehicle. Confirm which structure applies before accepting any quoted price.
Day Trip vs Overnight: How This Changes the Transfer Structure
For a day trip from Bangkok, the transfer is round-trip with a midday waiting window. The driver returns you to Bangkok the same evening, which means the return leg compounds whatever traffic is running in the Bangkok corridor at your departure time from Pak Chong, typically around 15:00 to 17:00. On a weekend afternoon, that is a congested window. Arrival back in central Bangkok can be between 18:00 and 20:00, depending on conditions.
The day-trip transfer structure works cleanly when the Bangkok departure is before 07:00, the itinerary is realistic about what can be covered in a single day, and the return departure from Pak Chong is before 16:00 to avoid the worst of the Bangkok-bound traffic.
For an overnight trip, the transfer is one-way in each direction, booked as separate legs. This is a cleaner logistical structure. The outbound driver does not need to wait; there is no waiting fee, and the return transfer can be separately timed to match the second day's program rather than being constrained by the first day's turnaround.
Travelers already building a Khao Yai overnight into a broader Thailand program should read the luxury Khao Yai excursions from Bangkok guide for guidance on structuring the program once the transfer puts you there, including wildlife drive timing, vineyard access, and the accommodation options worth committing to.
What to Confirm Before You Book
The majority of problems with Bangkok-to-Khao Yai transfers are not caused by bad operators. They are caused by under-specified bookings. Confirming the following before payment resolves most of them.
Vehicle model, not category. Ask for the specific model, not "SUV" or "van." A confirmed Toyota Fortuner is a different thing from whatever vehicle is available on the day.
Luggage capacity. State how many bags and approximate sizes. Operators who have correctly matched the vehicle to the luggage do not need to guess at the departure point.
Departure point. Hotel lobby, airport, or a specific pickup address. This matters for the Bangkok morning, especially for travelers connecting from Suvarnabhumi or Don Mueang directly to the Khao Yai transfer. The Thailand airport transfer guide covers how to structure the airport-to-hotel leg before the Khao Yai transfer sequence begins.
Driver's English proficiency. Not required for a transfer-only booking. Necessary if the driver is also acting as a local contact or handling park entry formalities on arrival.
Waiting fee structure. For day trips: confirm the daily waiting rate, whether it is included in the quoted price, and the maximum waiting time the operator will accommodate before additional charges apply.
Return transfer arrangement. For overnight trips, confirm whether the return requires rebooking separately or is included. Confirm the return pickup address if it differs from the original destination.
Park entry handling. Confirm whether the operator handles park entry fees at the gate or whether the passenger pays separately on arrival. Both structures exist. Knowing which applies avoids confusion at the gate that delays entry.
If you are serious about building the Bangkok to Khao Yai transfer into a well-sequenced program, confirm the vehicle and the guide separately before either booking is finalized. The transfer and the experience inside the park are two different products from two different operators in most cases. Treating them as a single booking can leave a gap in the park itinerary that is only discovered on arrival.
Sample Transfer Itinerary Structure
| Stage | Timing | Notes |
|---|---|---|
| Bangkok departure (hotel lobby) | 06:00 to 06:30 | Before peak expressway congestion |
| Rangsit / Highway 1 corridor | 06:30 to 07:30 | Clear at this hour on weekdays; moderately busy on weekends |
| Saraburi interchange | 07:30 to 08:00 | Turn east onto Highway 2 toward Pak Chong |
| Pak Chong town | 08:30 to 09:00 | Last fuel, convenience stops, and cash before the park |
| Khao Yai National Park entrance gate | 09:00 to 09:30 | Entry fee payment, vehicle fee, and confirm the guide meeting point |
| Wildlife drive or park activity | 09:30 onward | First activity window. Earlier arrival captures more of the morning |
| Vineyard or lunch (Pak Chong side) | 12:00 to 14:00 | GranMonte, PB Valley, or park restaurant, depending on format |
| Return departure (day trip) | 15:00 to 16:00 | Leave Pak Chong before 16:00 to avoid Bangkok corridor congestion |
| Bangkok arrival (day trip) | 18:00 to 19:30 | Estimated, depending on departure timing and traffic |
For overnight transfers, the outbound leg follows the same timing. Return transfer is booked separately for day two, ideally timed for a post-lunch departure to avoid both the park's midday window and the Bangkok evening peak.
Who This Transfer Is Not For
A Bangkok to Khao Yai private transfer in a day-trip format is not the right structure for travelers who want to spend meaningful time at both the national park and a vineyard in a single day. That itinerary exists, but only with a 06:00 departure from Bangkok and a very specific schedule. It does not tolerate a leisurely hotel breakfast.
This transfer is not suitable for travelers expecting a three-hour scenic drive that rewards stopping. The Bangkok-to-Saraburi stretch of Highway 1 is a functional expressway. The scenery becomes interesting from Pak Chong onward. The drive is comfortable and uncomplicated, but it is a road transfer, not a scenic route.
Private transfer and park guiding are not the same service. The driver drops you off at the park entrance. What happens inside requires a separately arranged licensed guide. Travelers who assume the driver will guide them through the park will arrive to find someone who drops them at the gate and waits in the car park.
Booking this transfer the morning before departure during a Thai public holiday long weekend is a real risk. Vehicle availability in Bangkok narrows significantly during Songkran in April and the December to January peak. Operators with quality vehicles and confirmed availability book out days in advance during these windows.
For travelers planning a multi-destination Thailand trip in which Bangkok and Khao Yai are part of a larger sequence, the 2-week Thailand luxury itinerary guide explains how to position the Khao Yai segment within the broader routing before confirming any Bangkok departure.
Plan Your Bangkok to Khao Yai Transfer with Southeast Asia Simplified
If the transfer is only one part of a Bangkok and Khao Yai program you are building, the vehicle and route will be determined quickly once the rest of the sequence is clear. The decisions that take longer are those adjacent to the transfer: the guide, the accommodation, the vineyard booking, and where Khao Yai fits within a larger Thailand itinerary.
For the Bangkok side of the program, the Bangkok private tours and wellness guide covers how to structure the days in the city before the Khao Yai departure. For travelers still sequencing the broader trip, the Central Thailand beyond Bangkok guide covers how Khao Yai connects to the wider central region routing before flights south or north are confirmed.
If you want help with sequencing the full transfer-and-experience program, plan your Bangkok-to-Khao Yai trip with Southeast Asia Simplified at southeastasiasimplified.com/contact-us.
FAQ: Bangkok to Khao Yai Private Transfer
How long does a private transfer from Bangkok to Khao Yai take?
A Bangkok to Khao Yai private transfer takes between 2.5 and 3.5 hours under normal conditions, depending on departure time and traffic in Bangkok. The route covers approximately 190-200 km via Highway 1 north to Saraburi, then Highway 2 east through Pak Chong to the park perimeter. Departures before 07:00 consistently produce the shorter end of that range. Departures between 08:00 and 10:00 on weekdays add 30 to 45 minutes through the Bangkok northern corridor. On weekends, the same corridor can add up to 60 minutes if the departure falls between 07:30 and 09:30.
What is the best vehicle for a Bangkok to Khao Yai private transfer?
The best vehicle depends on group size and luggage. For one to two passengers with light bags, a standard sedan is adequate for the route. For two to three passengers with full overnight luggage, an SUV such as a Toyota Fortuner or Mitsubishi Pajero Sport is the practical choice. For four or more passengers, a Toyota Commuter minivan handles everyone and their bags without compromise. For travelers who want a higher level of comfort on a three-hour road journey, a Toyota Alphard is worth the premium. Confirm the specific vehicle model when booking, not just the category.
Is a Bangkok to Khao Yai private transfer worth it compared to self-driving?
For most travelers, a Bangkok to Khao Yai private transfer is the more practical choice. Self-driving requires a license valid for Thailand, familiarity with Highway 1 and the Saraburi interchange toward Pak Chong, and a vehicle that handles the two-lane approach road into the park perimeter. The time savings over a private transfer are minimal. A private transfer allows passengers to rest, adjust the itinerary by phone during the journey, and arrive at the park without the parking and navigation questions that come with a rental vehicle. For travelers who want the freedom to stop at will along the route, self-driving is reasonable on this road. For everyone else, a private transfer is the cleaner structure.
How much does a Bangkok to Khao Yai private transfer cost?
Estimated costs in 2026: a standard sedan costs approximately 2,000-2,800 THB one way. An SUV costs approximately 2,800-3,800 THB one way. A Toyota Alphard costs approximately 3,500-5,000 THB one way. A minivan costs approximately 3,500-5,500 THB one way. Luxury vehicle options start at 6,000 THB. For day trips, a waiting fee of approximately 500-1,200 THB applies for the duration the driver remains in Pak Chong. All figures are estimates and vary by operator, season, and departure point. Confirm the full rate, including waiting fees and return structure, before accepting any quoted price.
What is the best time to leave Bangkok for this transfer?
Departing Bangkok before 07:00 is recommended for any Bangkok to Khao Yai private transfer that includes a morning in the park. Departures at 06:00 or earlier clear the city before the main traffic builds in the Don Mueang and Rangsit corridor, resulting in arrival in Pak Chong around 08:30 to 09:00. On weekend mornings, a 06:00 departure is not early; it is necessary. The morning wildlife window inside Khao Yai peaks between 06:00 and 09:00, and a Bangkok departure that gets you to the gate by 09:30 is the latest that still allows for a meaningful park morning.
Can the private transfer driver wait in Pak Chong during a day trip?
Yes. Most operators structure day-trip transfers with the driver waiting in Pak Chong or at a designated point outside the park during the visit. A waiting fee typically applies, ranging from 500 to 1,200 THB, depending on the operator and the waiting duration. Some operators quote a flat all-day vehicle rate that includes both the transfer and the waiting period. Confirm which pricing structure applies and the maximum waiting time included before accepting the booking. If the itinerary runs longer than the agreed window, additional charges may apply.
Does the private transfer driver handle park entry at the Khao Yai gate?
Most transfer operators drive to the entrance gate, where entry fees are paid separately by the passenger or handled by the operator, depending on the arrangement agreed at booking. Foreign national entry fees are 400 THB per adult, based on current DNP rates, with an additional vehicle fee. If the operator quotes a package rate that includes park entry, confirm specifically what is covered. If fees are not included, carry sufficient cash for gate entry, as card payments are not consistently available at all national park entrances in Thailand.
Conclusion
A Bangkok to Khao Yai private transfer is a direct, manageable road journey that most travelers overcomplicate or underprepare for in equal measure. The route is not the variable. The vehicle choice and the departure time are.
Get the vehicle right for the group size and luggage. Leave Bangkok before the morning congestion settles into the northern corridor. Understand what the driver and guide cover before both bookings are confirmed. And if the itinerary includes an overnight stay, book the return transfer as a separate one-way leg rather than a round trip with a waiting structure that constrains both days.
It is a straightforward journey, but one where small decisions determine the outcome. Khao Yai rewards travelers who plan the transfer before they plan the destination.
All pricing figures quoted in this article are estimates based on current operator data and traveler-reported rates as of 2026. Costs vary by operator, vehicle class, seasonal demand, and departure logistics. Confirm all rates directly with your transfer provider before confirming any booking. For national park entry fees and vehicle regulations, refer to the Department of National Parks, Wildlife and Plant Conservation at dnp.go.th.