BirdForum is the net's largest birding community dedicated to wild birds and birding, and is absolutely FREE!

Register for an account to take part in lively discussions in the forum, post your pictures in the gallery and more.

Reply to thread

Message: <blockquote data-quote="Mysticete" data-source="post: 3497895" data-attributes="member: 67784">The thing to keep in mind though is that biology is not physics. A lot of aspects of biology are not quantifiable and absolute, but rather exists as gradients. Species...by there very nature...are human constructs used to bring some sense of order to a very disorderly system. The whole underlying theme of biology is evolution, which is based on species evolving into new species. Because of that, we see a wide range continuum of organisms at different stages of the speciation process, and each group of organisms may or may not acquire the traits that lead to recognition of of being a distinct "species" at different times or in a different order.The different species concepts get different results simply because they focus on different stages of the speciation concept.</blockquote>