[gd124]

I'm surprised that pumas and leopards could crossbreed since I always thought they were in different genuses Felis vs. Panthera.

I think that most of the hybrids are infertile, but I suppose the odd one might be able to reproduce. It would be really cool if a couple of totally new species had developed in Britain through hybridization. Imagine if pumards became a protected species!

[spetznaz]

Most are infertile .....apart from the offspring of tigers and lions. Tigers and lions are basically so similar that their offspring are able to reproduce (eg a lion can mate with a tiger to give a tigon ....and then the tigon can mate with a tiger to give a ti-tigon, and so forth). It is virtually impossible to tell the difference between a lion and a tiger once you remove the hide.