Swallows in Flight

All photos taken in Manitoba by Christian Artuso

(above) Bank Swallow: Note notched tail and small-headed appearance.
The  diagnostic breast band and white collar may be obscured in silhouette
(above) Northern Rough-winged Swallow: Square tail and brown throat best features
to distinguish from Bank Swallow,  although the latter may be hard to judge in silhouette.
Also usually shows more contrast between the pale base of the underside of the primaries and the axillaries.
(above) Cliff Swallow 1: Note how in silhouette the pink and rufous colors can be obscured
 (the bird on the top left for example could be mistaken for a Northern Rough-winged Swallow,
although note difference in tail and wing shape)
(above) Cliff Swallow 2: Of course the contrasting pale rump and collar are unmistakable in these views.
(above) Purple Martin: Even in silhouette distinctive – large size, notched tail and that long-winged elegant shape.
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