How baby Cuckoos and Dolphins connect with their moms (or who they claim is mom!) is very different but it's all about how Mom sounds.. :)
Dolphin call tells calf who's mum
Female bottlenose dolphins whistle 10 times more often than usual after giving birth in order to help newborns recognise who is "mum".
Read all the story here and listen to the whistles of some Mums!
Cuckoo Chicks Change Calls to Mimic Host
The chicks of a species of Australian cuckoo can adjust their call in order to fool other species into rearing them, despite never having heard the cry, researchers have found.
Read all the story here
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