This is one of the many dusky langurs I met while in Thailand. This one photographed in Khlong Saeng, a mostly flooded national park where islands of mountainous land rise out of all the water. Nikon D500 with Nikkor 200-400mm lens (at 400mm) ISO 800, f/4 at 1/200th of a second.

A baby stump-tailed macaque checks out her new world from the safety of her mother’s lap. Photographed near Kaeng Krachan National Park on the Malay Peninsula of Thailand. Nikon D810 with Nikkor 200-400mm lens (at 400mm) ISO 1600, f/5.6 at 1/250th of a second.

Tree monitors are very big lizards — three feet long or more. I spotted this one while on a boat in Khlong Saeng in Thailand. The dead trees were protruding from the water in this permanently flooded region. Nikon D500 with Nikkor 200-400mm lens (at 350mm) ISO 800, f/4 at 1/1250th of a second.

This male stump-tailed macaque might look aggressive, but he was just having a good yawn (while displaying the results of his lack of proper brushing technique). Photographed on the Malay Peninsula of Thailand. Nikon D810 with Nikkor 200-400mm lens (at 240mm) ISO 800, f/4 at 1/160th of a second.

One of the handful of white-handed gibbons that I saw while in Thailand. These guys come in two colors — darker, almost black fur like this one, and also a much lighter, beige color. This gibbon had been quickly moving through the canopy, calling his mate for quite a while as I was scurrying below trying to find an opening in the foliage to grab a shot or two. Nikon D500 with Nikkor 200-400mm lens (at 400mm) ISO 800, f/4 at 1/160th of a second.

I spent about an hour with a troop of more than thirty or so stump-tailed macaques, just outside of Kaeng Krachan National Park in Thailand. There were three babies among them that were naturally the most curious about me. This little guy kept poking his head out from all that foliage providing some nice looks. Nikon D810 with Nikkor 70-200mm lens (at 200mm) ISO 1600, f/4 at 1/1000th of a second.

A stump-tailed macaque relaxes in a tree while waiting for the rest of the troop to catch up. I think it goes without saying that guy is in fact a guy. He allowed a close approach and I was able to use my wide angle lens to get him within his forest environment. Nikon D810 with Nikkor 17-35mm lens (at 17mm) ISO 1600, f/4.5 at 1/400th of a second.

Not that I have any complaints about our Eastern grays or American reds, but squirrels in other parts of the world can be pretty cool. This is the Malayan giant squirrel (also known as the black giant squirrel). S(he) was hanging around in a tree by my tent in Kaeng Krachan National Park in Thailand. They range throughout a good portion of Southeast Asia and live up to there name with a total body length — from nose to tip of tail — that can reach four feet. Nikon D500 with Nikkor 200-400mm lens (at 400mm) ISO 1600, f/4 at 1/1250th of a second.

Long-tailed macaques, also known as crab eating macaques, are fairly common monkeys in southeast Asia and they can often be spotted living amongst human populations. This guy looks to be out on some wild mountainside, but he was actually above a temple that sees quite a bit of daily foot traffic. He was calling across an open area to the macaques on the other side. Nikon D500 with Nikkor 200-400mm lens (at 200mm) ISO 800, f/4 at 1/640th of a second.

The dusky langur was one of two species of langur that I photographed while camping in Kaeng Krachan National Park in Thailand. This guy I spotted in a dark forest through trunks of bamboo. I had to crank up the ISO to 3200 and still could only manage 1/50th of a second shutter speed. Luckily the langur wasn’t moving around much and I kind of liked the resultant grainy quality of the image.
Nikon D500 with Nikkor 200-400mm lens (at 400mm) ISO 3200, f/4 at 1/50th of a second