Emergency Peep

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Today I observed a certain behavior of the Simpsons family: I approached the nest in order to take some pictures. The chicks were putting out there little heads in the hope for more food. Homer spotted me and gave a short and low peep. Immediately the chicks pulled back their heads and kept quiet. Homer watched me from a distance giving the peep sound every now and then. To me it sounded like: “Hey little chicks, keep quiet until the threat is over!” Eventually I left the nest and Homer flew to the nest to check if every of the four chicks was still there.