Cold, blustery spring morning in the Bitterroot Valley. Observed group of tree swallows perching in Siberian elm catching morning sun rays, video follows.

There are about 81 species of swallows/martins worldwide in the Hirundinidae family; on all continents except the Arctic and Antarctic regions. All North American species are primarily insect eaters, excepting the tree swallow which eats a quantity of vegetable matter...wax myrtle berries being a favorite. A study done by F.E.L. Beal in 1918 discovered that Diptera (flies) comprise ~40% of animal food taken.