Chien Lee / Atlas Moth (Attacus atlas) male, Khao Yai National Park, Thailand

Alan Watson / Buttress roots of (Tetrameles nudiflora) in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Buttress roots of tree (Tetrameles nudiflora) in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male brings food to nest, Khao Yai National Park, Thailand

Thoswan Devakul / Finlayson's squirrel feeding. (Calloscuirus finlaysoni) Khao Yai NP, Thailand

Chien Lee / Grass-blade Grasshopper (Acrida sp) camouflaged on branch, Khao Yai National Park, Thailand

Justine Evans / Alpha-male White-handed gibbon (Hylobates lar) sitting on branch observing a neighboring gibbon family on the border of his territory, "Chai" a member of study group "C", Khao Yai National Park, Thail...

Justine Evans / Female White-handed gibbon (Hylobates lar) in tree, "Cassandra" a member of study group "C", Khao Yai National Park, Thailand, Endangered species

Justine Evans / Alpha male White-handed gibbon (Hylobates lar) hanging from strangler fig, "Chai" a member of study group "C", Khao Yai National Park, Thailand, Endangered species

Justine Evans / Alpha male White-handed gibbon (Hylobates lar) in tree observing a neighboring gibbon family on the border of his territory, "Chai" a member of study group "C", Khao Yai National Park, Thailand, Endan...

Justine Evans / Alpha female White-handed gibbon (Hylobates lar) sitting in tree, "Cassandra" a member of study group "C", Khao Yai National Park, Thailand, Endangered species

Alan Watson / Buttress roots of tree (Choerospondias axillaris) and Palm (Calamus sp) in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand.

Alan Watson / Buttress roots of an Altingia tree (Altingia excelsa) and Bracket fungi in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Common grass yellow butterflies (Eurema hecabe contubernalis) on log in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Tropical rainforest along Lam Ta Khong River, Khao Yai National Park, Nakhon Ratchasima Province, Thailand, October 2006

Alan Watson / Bracket fungi growing on fallen tree in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Mating slugs in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Praying mantis on plant, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Fan palm (Livistona speciosa) in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Fan palm (Livistona speciosa) in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Alan Watson / Bracket fungi growing on fallen tree in tropical rainforest, Khao Yai National Park, Nakhon Ratchasima Province, Thailand

Tim Laman / Oriental pied hornbill (Anthracoceros albirostris) in flight in rainforest canopy. Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male delivering food to nest. Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male at nest hole, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male delivering snake to female and chick inside the nest. Khao Yai National Park, Thailand

Tim Laman / Wreathed hornbill (Rhyticeros / Aceros undulatus) female inside nest cavity, adding mud plaster to the side of the nest hole, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male at nest hole, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male at nest hole, Khao Yai National Park, Thailand

Tim Laman / Austen's brown hornbill (Anorrhinus austeni) with fruit at nest hole, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) landing at nest hole, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male portrait, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male portrait, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male perched in tree, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male in flight, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male at nest hole, Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male brings fruit to nest hole, Khao Yai National Park, Thailand

Tim Laman / Austen's brown hornbill (Anorrhinus austeni) at nest entrance peering in, Khao Yai National Park, Thailand

Tim Laman / Great hornbill (Buceros bicornis) male delivering food to female inside the nest. Khao Yai National Park, Thailand

Tim Laman / Great hornbill (Buceros bicornis) male delivering food to female inside the nest. Khao Yai National Park, Thailand

Tim Laman / Oriental pied hornbill (Anthracoceros albirostris) chick placing its cloaca in nest hole entrance to defecate out of the nest. Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) male taking off from nest hole, Khao Yai National Park, Thailand

Tim Laman / Oriental pied hornbill (Anthracoceros albirostris) female in nest cavity. Khao Yai National Park, Thailand

Tim Laman / Great indian hornbill (Buceros bicornis) in flight, Khao Yai National Park, Thailand

Thoswan Devakul / Black giant squirrel {Ratufa bicolor} feeding in tree, Khao Yai NP, Thailand.

Thoswan Devakul / Pigtail macaque feeding in fruit tree, Khao Yai NP, Thailand

Gerry Ellis / Low montane tropical rainforest, Khao Yai National Park, Thailand

Gerry Ellis / Haew Narok Falls, upper section, Khao Yai National Park, Thailand

Thoswan Devakul / Dry evergreen forest, aerial view. Khao Yai NP, Thailand

Justine Evans / White handed gibbon, alpha female {Hylobates lar} in tropical rainforest, Khao Yai

Thoswan Devakul / Great Indian hornbill (Buceros bicornis) male, Khao Yai NP, Thailand