Chunky C. roosts alone in a willow thicket. Her metabolic rate increases. Overnight, a new egg has moved down her oviduct. By dawn, she is “in full”—the egg occupies the shell gland, putting pressure on her cloaca.
A female cuckoo has just 10–15 seconds to lay an egg once she reaches a host nest. She perches on the rim, arches her abdomen, and deposits the egg—often while the host is away. Then she flies off, leaving no trace except one extra egg. pgd954 tour of out chunky brood parasite in be full
: Many parasites evolve eggs that look identical to the host's eggs to avoid being rejected. Gape Matching Chunky C