I was cleaning my garden pond at the end of October and came across a live tadpole. I had previously suspected that some tadpoles are late undergoing metamorphosis, but this one really missed the boat. Is this a recognised phenomenon, and what is the explanation?
鈥淎 chick hatches by chipping away at the shell with its egg tooth. Two chicks would obstruct each other鈥�
Nick Hardwick, Walton-on-the Hill, Staffordshire, UK
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