Single cuckoo egg lying in a nest belonging to a smaller bird.
Schlüsselwörter
differently,
bigger,
cuckoo,
belong,
egg,
standard,
species,
smaller,
general,
ornithology,
lying,
survival,
bird,
wildlife,
nest,
and,
animal,
ecology,
reproduction,
single,
the,
sulk,
coloured,
foreign,
avian,
biology
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