One of the lifer sightings for me during the Montana portion of our trip west, was the sight of cliff swallows nesting on actual cliffs. Where I'm from the cliff swallows nest on buildings, bridges, culverts, and dams, but I'd never seen them nesting on the natural features for which they are named.
These shots were taken in and around Virgelle, Montana, where we embarked upon our three-day canoe down the Missouri River.
The truly amazing thing about cliff swallows is that they build their nests one bill-full of mud at a time. It can take them up to two weeks to build the nest—depending upon how far it is to a reliable source of mud. A pair will bring more than 1,000 small batches of mud to the nest site during construction of the nest.Cliff swallows are colonial nesters, preferring to nest with other cliff swallows.
The colony near Virgelle had a mud source just a few hundred feet away.
The finished nests are jug-shaped and provide a perfect spot for raising up a brood of baby cliff swallows. Some of the colonies we found along the Missouri had as many as 200 nests. Larger colonies of as many as 2,000 nests can be found.As we floated past these birds along the river, I wondered what Lewis and Clark thought about them, when they saw the first cliff swallows chattering along the muddy banks,cutting through the blue skies, and swooping up to their odd-looking nesting colonies. It must have been a remarkable thing to see.
I know it was for me.