The Costa Rican swift (Chaetura fumosa), is a species of swift in the Apodidae family. It was split from the band-rumped swift (Chaetura spinacauda), in 1998. It is found in Colombia, Costa Rica, and Panama. Its natural habitat is subtropical or tropical moist lowland forests. It is blackish and slim-winged with sharply contrasting pale-rump band and distinctly pale throat. It has a sooty black coloration is tinged with glossy blue. Its bill and feet are black in comparison to the band-rumped swift.