[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
> Stephen J. Gould wrote an essay about this. But hasn't New Zealand been
> separated from all other land masses for an awful long time? If so, I
> assume that the ancestors of NZ birds would have to have flown there
> originally. Why would the kiwi have a big egg if its big ancestors had
> small ancestors?
The kiwi is beleived to have evolved from a large ratite (most
ratites being large, like ostriches and emu) that evolved small size, but
the size of its egg didn't reduce as quickly, resulting in a little bird
wityh a huge egg. However, the huge egg was kept since this
benefits the kiwi by producing very large and precocial hatchlings.