Brown creeper

Rondeau Provincial Park, Ontario, Canada, April 1, 2021.


More often heard than seen, this one was working the trees next to the yard.
Certhia americana
In Arizona, Brown Creeper nests often have two openings, one which serves as an entrance and the other as an exit. Entrances face downward and exits upward.
Brown Creepers burn an estimated 4–10 calories (technically, kilocalories) per day, a tiny fraction of a human’s daily intake of about 2,000 kilocalories. By eating a single spider, a creeper gains enough energy to climb nearly 200 feet vertically.
Source -Cornell Lab of Ornithology- All About Birds

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