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Territoriality in brown bears
The article states that "unlike brown bears, polar bears are not territorial". I don't think this is a valid comparison, since as far as I know brown bears aren't territorial in the classic sense of the term either, and only engage in conflicts when certain resources are directly threatened by others of their kind. This is also supported by the Wikipedia article about the species. TheBlackCaiman (talk) 12:52, 7 August 2022 (UTC)[reply]
Polar bears are listed as “vulnerable” on this page, but the source for that came out in 2015 (8-9 years ago). Obviously this information can’t be updated without any new data, but we should look for more recent sources on the polar bear’s conservation status. LordOfWalruses (talk) 17:39, 21 January 2024 (UTC)[reply]
It states in Characteristics that polar bears are dichromats and lack the cones for green. This was changed sometime since last August, but I haven’t figured out the revision history interface to figure out when.
Mammalian dichromats have cones sensitive to more-or-less blue and more-or-less green, but lack cones sensitive to more-or-less red. If polar bears lacked green-sensitive cones, they would be monochromats, so this is likely vandalism.
The previous text mentioned blue-violet and yellow-green, but lacking a reference, I think it is best simply to specify that they are dichromats, which is linked. Applying human color terms to peak sensitivities in nanometers is somewhat subjective, and unless the specific peaks for polar bears, or at least for Ursidae, have been measured, it’s less than useful.
I’d fix it, but I haven’t done much editing in many years, and I don’t want to just jump into a semi-protected article, especially when the bulk of recent edits have been by a small group of editors. Curtis Clark (talk) 21:06, 19 February 2024 (UTC)[reply]