Does anyone else think this animal is extinct?
- Thread starter The Carcharodontogenius
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I already answered this - these differences are extremely slight, and if they are legitimate and not just the result of a biased sample size (due to the relative scarcity of remaining specimens, it’s a bit hard to be certain what the average Caspian tiger actually looked like), they’re probably due to clinal variation - when a taxon differs slightly across its range due to different conditions without actually being distinct populations genetically speaking. The tigers in Siberia having longer fur was probably due to the climate there being colder, the same way that spotted hyenas have the ability to develop a thicker winter coat when they’re kept in zoos in colder climates (this doesn’t make them a distinct animal from the wild populations). Again, they were part of the same continuous population before recent human pressure caused their distribution to split, which means they were still breeding and intermingling with one another. Genetically they’re the same animal.
I think the better question is why the WWF says the Caspian tiger is extinct in the wild when the common consensus is that it’s fully extinct.
Ok. You set me right.
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The Lear's Macaws below look just like the above specimen of a Glaucous Macaw. The specimen is at the Buenos Aires Natural History Museum.
They probably aren't Lear's Macaws because the Lear's Macaws are also known as Indigo Macaws. The clue is in the name.
They probably aren't Lear's Macaws because the Lear's Macaws are also known as Indigo Macaws. The clue is in the name.
You know how on Wikipedia it says that the Glaucous Macaw had pale turquoise feathers with a grey head? What if the head was actually green & not grey?
en.wikipedia.org
I think that because on Birds of the World, it says that the Glaucous Macaw has a grayish-green wash on the head & breast while the Lear's Macaw has a more noticeably bluer head.
birdsoftheworld.org
Glaucous macaw - Wikipedia
I think that because on Birds of the World, it says that the Glaucous Macaw has a grayish-green wash on the head & breast while the Lear's Macaw has a more noticeably bluer head.
Identification - Glaucous Macaw - Anodorhynchus glaucus - Birds of the World
Species accounts for all the birds of the world.
birdsoftheworld.org
Could the Lear's Macaws in this image be Glaucous Macaws?
They do look very similar in coloration to this Glaucous Macaw specimen.
They do look very similar in coloration to this Glaucous Macaw specimen.
Good morning, to begin with I don't know how to speak English, I live in the area where the "glaucous macaw" as you call it once lived, to begin with, none of the macaws that you show are glaucous, all of them are Lears' macaws, I have seen through local foundation archives the bird and its description up close, you simply cannot see that the glaucous macaw changes color. In the dark or without sunlight, it is bluish in color. When it is illuminated in a certain way it becomes almost light blue, or aqua green, its head is dark. This does not happen in any way with the Lear's macaw.
To finish, this bird is extinct, no one here, not even the oldest inhabitants who live in surrounding areas have knowledge of this bird, I have personally known fields of "yatai palm" which are small today, I have also traveled by boat along the river Uruguay and Parana, I have sailed kilometers on fishing trips, the cliffs where the bird nested in the past, today are deserted.
If there is any chance it exists, it is in private collections.
To finish, this bird is extinct, no one here, not even the oldest inhabitants who live in surrounding areas have knowledge of this bird, I have personally known fields of "yatai palm" which are small today, I have also traveled by boat along the river Uruguay and Parana, I have sailed kilometers on fishing trips, the cliffs where the bird nested in the past, today are deserted.
If there is any chance it exists, it is in private collections.
Didn't know that. Thanks for sharing. Pretty interesting
