When studying the parenting behavior of lined seedeaters in Brazil, researchers found a mortally wounded nestling. They thought the culprit may be a reptile, larger bird or possibly ants, since the body was left behind. Video revealed the attacker was a wasp, seen here repeatedly biting the baby bird’s head.
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Video: S. Frankhuizen, L.E. Lopes and F.C.R. Cunha/Ethology 2020

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