After birding on Little Tobago, we drove to Argyle Falls, where we hiked up to a nice waterfall and saw a few more birds along the way. We stopped at a viewpoint on the way there where our guide spotted this little nest, with two chicks inside. The outside is covered in lichens to help camouflage it.
Traditionally, the bird order Apodiformes contained three living families: the swifts (Apodidae), the tree swifts (Hemiprocnidae), and the hummingbirds (Trochilidae). In the Sibley-Ahlquist taxonomy, this order is raised to a superorder Apodimorphae in which hummingbirds are separated as a new order, Trochiliformes. With nearly 450 species identified to date, they are the most diverse order of birds after the passerines.