A great reed-warbler, or Acrocephalus arundinaceus, was captured feeding its "foster chick," a common cuckoo.

Female cuckoos often lay eggs in the nest of great reed-wablers.

When they hatch, the newborn cuckoos push the "native" eggs out of the nest and enjoy the exclusive care and eventually outgrow their new parents.

(Cover photo is taken in Panjin City, northeast China's Liaoning Province by Zhang Ming with Luli Studio.)

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