Rhacophorus harrissoni Harrisson’s Flying Frog
Some other names for this species:
Brown Tree Frog
Gunung Mulu National Park, Sarawak, MalaysiaFebruary 26, 2018
Harrisson’s Flying Frog (Rhacophorus harrissoni) Harrisson’s Flying Frog (Rhacophorus harrissoni) Harrisson’s Flying Frog (Rhacophorus harrissoni) Harrisson’s Flying Frog (Rhacophorus harrissoni)
The Frogs of Borneo website describes Rhacophorus harrissoni as "a brown, rather unspectacular frog". Rude!

That same site adds "Little is known about this frog, probably because it spends most of its life high up in the trees". We were lucky to see two of them. Thanks to Borneo frog expert Alexander Haas for helping me identify these frogs.

Online references:
Printed references: