Tree Swallow (Tachycineta bicolor) a common swallow of marshes and open fields, the Tree Swallow is a ready inhabitant of nest boxes as I found out when I took this shot in Waterton National Park, Alberta, Canada. This was in the bison compound area and these birds shared alternately with the Bluebirds. They were a joy to watch.
Canon EOS XTi; 150-500mm lens, texture by Anna Lenebem, thank you!
This image will be part of my upcoming Songbird Calendar.
This swallow averages 13.5 cm (5 inches) long and weighs about 20 g. The bill is tiny. The adult Tree Swallow has iridescent blue-green upper parts, white underparts, and a very slightly forked tail. The female usually has duller colours than the male, often more greenish than the more bluish male. The juvenile plumage is dull grey-brown above and may have hint of a gray breast band.