The Whiskered Treeswift is a forest-dwelling treeswift with long, whisker-like white feathers and a long tail. Males and females differ in ear-patch color.
Long white feathers extend above the eyes and along the cheeks. The body is glossy brownish olive, while the head and wings are glossy blue-black. Males have chestnut ear patches; females have bluish ones.
It lives in wet lowland and foothill forest, perching on exposed branches in the canopy or beside clearings and sallying out to forage.
It gives squeaky calls and high-pitched chattering.
A half-saucer nest of feathers and saliva is attached to a thin branch and holds one egg. Both adults incubate and tend the young.
An extinction-risk assessment has not been added yet.