TOP 10 ANIMAL CHEATS 1. CUCKOO BIRD
This is truly the mother of all cheaters — the female cuckoo bird will not only raid the nest of her warbler neighbor to steal eggs, she then leaves her own eggs behind to replace what she just ransacked. In a true testament of nature vs. nurture, despite being abandoned, the baby cuckoo bird is just as much of a con artist as its birth mother. Thanks to incubating an egg similar in appearance to the other warbler eggs, the baby cuckoo bird blends among the other chicks and is therefore treated and fed like one of the family. You'd think with the baby cuckoo bird's rapid growth (we're talking 10 times the size of its foster mother!) the warbler would finally take notice that something is amiss. But hey, a mother's love can really turn a blind eye.
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