The Eastern Long-tailed Hermit has a long, down-curved bill and long white-tipped tail feathers. It feeds at flowers beside tropical forest streams and also takes insects when flowers are scarce.
Its long bill curves downward, and the central tail feathers extend beyond the others with white tips. The head is dark bronzy brown.
It uses lowland tropical-forest edges, especially shady sites beside streams, and hovers at flowers to drink nectar. It also eats insects when flowers are scarce.
An extinction-risk assessment has not been added yet.