Saw these Cliff Swallows under a bridge that we were walking by. I was looking for photos of flooding but the creek I was at was handling the rain well.
These birds build nest under bridges along creeks. I suppose in nature they build under natural cliffs. They catch bugs by flying just over the water, sometimes even picking up the bugs off the water. They also fly above the water 10 to 20 feet or more in the air. It is fun to watch them make a 45 degree turn for a bug.
Some swallows lay eggs in other nests they did not build. These same birds will lay eggs in their own nests. The foster mother will sit on all the eggs whether they are hers or another birds.
The Cliff Swallow winters in Paraguay and SE Brazil.
Cave Swallows look similar but have a more brownish forehead, while the Cliff Swallow has a more light colored. Cave Swallows are rare in the Midwest US. Cave Swallows have a range in southern Texas and Mexico.
Psalm 84:3 "The bird also has found a house,
And the swallow a nest for herself, where she may lay her young,
Even Your altars, O Lord of hosts,
My King and my God."
The psalmist (the sons of Korah) is jealous of the swallow that has access to the courts of the Lord and builds its nest there. God has now given us access to His presence by faith in prayer and meditation of Scriptures.