I understand your point,
Q, however, a couple of points:
1. It's not my list. The original question, not to be argumentative nor pedantic, simply asked about animals beginning with "U". The list differentiates one buzzard, in your objection, from another by the adjective "upland" (self-evident). But, especially in scientific classifications, that's the entire point... it's not considered to be the same as, for example, a "lowland" buzzard (if there is one).
2. Many, if not most of the examples given here differentiate one type of animal (example
sheep) from another, such as the Urial given by both you and
Cetti. Additionally,
Urson displays an entymology that is closely related to
Ursine, or
bear-like, which the porcupine (at least in North America) resembles, rendering that term a scientific classification, no?
Lastly, it appears that you might have had misgivings about definitive answers to the same question asked previously... here:
http://www.theanswerbank.co.uk/Animals-and-Nat ure/Preview/Question149504.html
Much to do about little, I'm sure, but, Hey! it's a slow day...
Good to see you again!