Photo: A tree swallow and a barn swallow, side by side

882 of 1241

It’s fun to see these two species perched right next to each other, offering us an opportunity for comparison.

The tree swallow (Tachycineta bicolor) on the left has a clean white front, while the barn swallow (Hirundo rustica) on the right has a tawny breast. The names refer to their preferred nesting places. The tree swallow builds nests in tree hollows, while the barn swallow nests almost exclusively in made-made structures, according to the Cornell Lab of Ornithology.

Would you like to see your nature photo featured on TreeHugger? Join the TreeHugger Photo Pool on Flickr and add yours to the group!

882 of 1241

More Slideshows