What kind of birds are those birds (image attached)?

As it flies, it dips the lower mandible into the water, skimming for fish. The razor-thin bill can slice through the water and, when it senses a fish, snaps the upper mandible down onto it. The skimmer is the only bird species in North and South America with such a foraging technique. black skimmer flock. read more

Birds as small as hummingbirds and as large as herons nest on tree branches; so do hawks, owls, and crows. The nests may be found at every level of the tree, from the crown to the under-story. They may be near the crotch, between branch and trunk, or out toward the end of a branch. read more