Swallows learn to open automatic doors to create nests inside a parking

These swallows learned how to fly in and out a parking garage—where they made their nests—by triggering the detectors on the automatic doors. Watching them flying in and out is simply amazing.

I imagine the swallows probably liked the garage's environmental conditions, safe from the elements and with a more stable temperature, and somehow quickly learned that approaching the doors opened them automatically.

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