The Northern Scrub-Flycatcher is a resident species, similar to the members of the Myiarchus family, which is notably difficult to identify at a species level. Like its name might imply, this small bird prefers scrub habitat, which is composed of small trees and tall grass. We found an individual at Tárcoles River, in the swampy area that surrounds the river. It was full of mosquitoes, which is probably the reason species like this one like the area. It was interesting to see this individual raising its crest, most probably a display to let us know we were in his/her territory.