Stock Photo - 22 July 2021, Saxony, Leipzig: A young cuckoo sits next to a male blackbird, who is probably the foster father, in a garden. Cuckoos lay their eggs in the nests of other birds. They are brood parasites, and the unwilling foster parents are called host birds. The young cuckoos leave the nest after about two weeks and are independent after three to four weeks. Photo: Waltraud Grubitzsch/dpa-Zentralbild/ZB. - Leipzig/Saxony/Germany

Stock Photo: 22 July 2021, Saxony, Leipzig: A young cuckoo sits next to a male blackbird, who is probably the foster father, in a garden.

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