European Cuckoo

Hasn't the same Order created Man and the Cuckoo ? (Masa Confusa)
The cuckoo is a type of grey European bird that lays eggs in others birds’ nests. When a female cuckoo is ready to lay her eggs, she finds a nest of a suitable host species and waits for the host bird to leave the nest unattended. She needs only a few seconds to fly to the nest, pick up one of the host’s eggs in her beak, and lay one of her own eggs in its place. Immediately afterwards she flies off, abandoning her offspring to the foster parents and eating the stolen egg. When the host bird returns, she usually accepts the cuckoo’s egg and incubates it with her own eggs. The cuckoo’s timing is precise, and its egg usually hatches before the host eggs. The hatchling cuckoo, with its eyes not yet open, ejects the unhatched host eggs from the nest. This process of ejection is innate. After ejecting the host’s eggs, the young cuckoo gets the undivided attention of its foster parents, which will feed and nurture it.

Ejection of host eggs from nest by cuckoo hatchling

When a hatchling senses that an adult bird is near, it begs for food by raising its head, opening its mouth, and cheeping. In turn, the foster parent stuffs food in the gaping mouth. These innate behaviors are replayed over and over, even after the young cuckoo is much larger than the adults.

The foster mother keeps feeding the cuckoo chick

Cuckoo's research references and picture credits: Neil A. Campbell, Lawrence G. Mitchell, and Jane B. Reece, Biology: Concepts and Connections, Redwood City, California: Benjamin Cummings, 1994, pp. 720-21; Cecile Starr and Ralph Taggart, Biology: The Unity and Diversity of Life, Belmont, California: Wadsworth, 1995, p. 914.

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