アバター - Beate Christine Hofmann
Beate Christine Hofmann
Hummingbirds can count their way to food

Birds

Hummingbirds can count their way to food

sciencemag.org - Cathleen O’Grady

Tiny, feisty rufous hummingbirds are known for their long migrations, which take them up and down the length of North America each year. Now, they …

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