How many times does it have to be pointed out that Humans and Gorillas are almost genetically identical and still can cannot breed?
I knew a woman whose pet canary laid an egg after a sparrow got into the outdoor aviary to steal food. The baby hatched and was a mottled yellow and brown canary-looking sparrow.
Zebras and donkeys have bred successfully in zoos - and horses and donkeys usually produce strong but infertile mules and hinnies... but, every so often, IIRC, the resulting offspring is not
infertile. (Wikipedia: Since 1527 there have been more than sixty documented cases of foals born to female mules around the world. In contrast, according to the ADMS, there is only one known case of a female hinny doing so.)
And check out this bizarre goat/sheep hybrid:
And a fertile hybrid: