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Message: <blockquote data-quote="Mysticete" data-source="post: 1810744" data-attributes="member: 67784">The Herp community has almost completely switched over to Evolutionary Species Concept, and I think you see a similar pattern in fish workers.BSC works so well for birds because it is so easy to test and so important to birds.  Birds rely on vocal and display mate recognition systems, which are amendable to human observation.  Also the majority of species are relatively easy to do field studies on in nature (at least compared to shrews and salamanders).  Biological recognition might also be more important just because birds have greater (intentional or accidental) dispersal capabilities compared to most organisms.In contrast, many species may rely on scent or similar chemical cues that might be too subtle for human detection as a speciation recognition.  Similarly, allopatry, habitat selection, and even "culture" may be more important in selection than any sort of barriers to interspecies mating.  There are plenty of examples of this, even within my subarea of interest (marine mammals).</blockquote>