Can we crossbreed a nile crocodile to an alligator?

The species you mention have less barriers, and wolves and coyotes are probably part of a Species complex more properly called a “superspecies”, horses and donkeys rarely (if ever) mate in the wild, and when they do in captivity, produce “Mules”, which are almost certainly sterile. read more

The lineages leading to modern crocodiles and alligators diverged in the Late Cretaceous Period (over 80 million years ago) at the latest. We know this because we have fossils that old of animals that were more closely related to alligators than to crocodiles. read more

Alligators and crocodiles co-exist only in the far south of Florida, but do not cohabit. Paul Roberts, Lake Cathie My son, who used to be a fisheries inspector stationed in Cairns, swore by an animal he called a"crocodiligator", though he has his tongue firmly in his cheek at the time. read more