Had the opportunity to watch cliff swallows building a nests.
This one was almost ready for eggs.
Chatham-Kent, July 7, 2023.
Petrochelidon pyrrhonota.
Although the Cliff Swallow can nest solitarily, it usually nests in colonies. Colonies tend to be small in the East, but further west they can number up to 3,700 nests in one spot.
source -Cornell Lab of Ornithology
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