[Cazador]

Hi Fons,

This is a neat idea. The "biological species concept" states that true species are unable to interbreed with one another in the wild. The barriers might be anatomical, genetic, behavioral, geographic separation, etc., so one should start by assuming that different species cannot interbreed. However, there are always exceptions to the rule, and sometimes things interbreed in captivity when they wouldn't in the wild. One could get a pretty good clue about which species are most likely to hybridize in captivity by looking at the phylogenetic charts in Rossman et al. to see which different species are most closely related. I don't have my book here at the office, or I'd have a quick look.

Rick