Mario Schweiger wrote:OK, coming back to interbreeding in terrariums.
Why, in nature two species dont interbreed (or very rarely only), like ammodytes and aspis in Bolzano, South Tyrol, Italy? If you keep them together in a terrarium it works much more "easy", especially if the two species are from distinct populations (for example aspis from lake Garda and ammodytes from Montenegro). It seems, snakes have no species-related foreplay (beside neck biting in some species), so what it is? Do snake species in overlaping areas have developed different pheromones, than their relatives far away? Any investigations on that? The same for the example ammodytes - xanthina or another example (but dont know if the offspring is fertile, at least partially): Macrovipera schweizeri x Daboia mauritanica.
Hybrids between ammodytes and berus are not that rare in Slovenia...another question is their offspring...surviving rates,fertility etc.