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Message: <blockquote data-quote="Mysticete" data-source="post: 3496762" data-attributes="member: 67784">As someone who follows Herpetology, I can certainly vouch that the BSC has been almost completely abandoned in reptiles and amphibians. My guess is that the same follows for fish and invertebrates. Mammals I think BSC is still heavily used, but even that depends varies by specific group.BSC is currently by far the most accepted and widespread species concept in Ornithology, but I would say that Ornithology is fairly unique. Birds in general are just really really easy to study using the concept, as most species use species recognition methods that are easy to observe and amendable to human observation (visual displays and sound). They also are generally pretty good at dispersal, which means that populations tend to be more fluid and thus there is more secondary contact and "need" to develop reproductive isolating mechanisms.Reproductive isolation is almost impossible to directly study in most other groups, either because it's not really very feasible to to observe taxa in the wild, because some senses such as smell that might be important in species discrimination for some groups are hard to identify.</blockquote>