Editing Chimney swift (section)

===Similar species===
The chimney swift looks very much like the closely related Vaux's swift, but is slightly larger, with relatively longer wings and tail, slower wingbeats<ref name = "Sibley"/> and a greater tendency to soar.<ref name = "NatGeo"/> It tends to be darker on the breast and rump than the Vaux's swift, though there is some overlap in [[plumage]] coloring.<ref name = "Sibley"/> It can be as much as 30 percent heavier than Vaux's swift, and its wings, which are proportionately narrower, show a pronounced bulge in the inner secondaries.<ref name = "SibleyWeb"/> The chimney swift is smaller, paler and shorter tailed than the [[black swift]].<ref name = "Sibley"/> In [[Central America]], it is most similar to [[Chapman's swift]], but it is paler (matte olive rather than glossy black) and has a stronger contrast between its pale throat and the rest of its underparts than does its more uniformly colored relative.<ref name = "Ridgely"/>