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="Rasmus Boegh" data-source="post: 1214511" data-attributes="member: 1146">I should have checked the new Birds of Peru instead of doing it on memory - I thought they mentioned the vocal variation, but they don't. Anyhow, what I meant is that:1) The species limits in N. leucopyga (-complex) needs resolving. Even if disregarding the potential species level splits, subspecific variations are poorly understood.2) N. l. leucopyga with the "standard voice" occurs widely north of Rio Amazon. In the Rio Negro region (not just in Jaú NP) there is another population, which morphologically is quite similar, but its voice is different. Some 50 years ago, the name latifascia was given to a population in far SW Venezuela and adjacent Colombia. In terms of biogeography, this region is part of the Rio Negro drainage. This taxon is still poorly known, and the name has been abandoned by some (while many still recognized it). It may - or may not - match the new population, in which case it really wouldn't be new at all. To settle this, a check of specimens and manuscripts is needed. Obviously, you can only name a new taxon once you've established with certainty that it isn't an already described taxon (otherwise, you'll just end up with a junior synonym).</blockquote>