3 Comments so far

1. snood84 Had this To Say

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   For the most part. You can look at a great example – the mule. It’s a very sturdy animal used to carry heavy loads over long distances. It’s the offspring of a male donkey and a female horse. It’s sterile, but it’s an animal that’s been around for thousands of years that’s been used to be a work animal.

   http://en.wikipedia.org/wiki/Mule

2. The First Dragon Had this To Say

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   I think you are talking about hybrids between different species, like mules or ligers. There are also hybrids within a species, like a hybrid between a collie and a bulldog.
   Most animals from different species cannot reproduce together at all. For those that can, yes the hybrid is completely functional except for its inability to reproduce.

3. chris b Had this To Say

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   For species that are close enough to breed and produce viable offspring are other wise normal, and it is not true that they are always sterile. Ligers, and other cat hybrids (look up bengal cat) are only sterile part of the time. Many snakes are species hybridized in captivity and they are almost always fertile.