Old time Mountain men also used to call them a Painter, which was some illiterate version of panther. You can read it in books about the period and in some old movies.
One of the “most SF things ever” I’ve seen is a sign explaining to people that a coyote is in the area, explaining what a coyote is, it’s not a dog and don’t pet it. I think this was Buena Vista Park.
As for mountain lions, expect it’s not the last one. Males can range far, a certain percentage have a tendency for wanderlust.
Up north, here in the PNW, I think “mountain lion” and “cougar” are used about equally. If you say “puma”, people will know what you mean, but might assume you’re talking about a shoe brand.
It’s rare to hear them referred to as “panther”, but that term is used elsewhere in the US.
I never even put together the “Snagglepuss is gay” joke. I watched him on TV as a kid and, okay, in retrospect I get it (speaks effeminately, has pink fur), but I didn’t realize that was what the comment was. That went over my head. I just thought of him as a “fancy panther”, and thought that was the reference. I feel dumb.
Okay, so I’m not the only one. But I think that was what @Roderick_Femm was referencing, since this is a story about a cougar in San Francisco, and one thing the city is known for is its gay scene. That’s the only way I can think that the comment might be considered offensive, and as I said, in retrospect that makes sense. I just didn’t pick up on that angle.
A few years ago there was an episode of Nature titled “Meet the Coywolf” about coyote/wolf hybrids, primarily in SE Canada and NE US. While I’m going from memory — it seems to have disappeared from the PBS website — researchers put a tracking collar on one and found that he had a remarkably large range, primarily using railroad right of way. So it seems logical that a cougar could do the same.
I’ve personally never heard of it called a ‘panther,’ except in the case of Florida panthers. However. . . for decades there have been intermittent sightings of ‘black panthers’ (i.e. mountain lions) in the southeast. Game wardens have said repeatedly that (except for the aforementioned Florida panthers), it’s very unlikely that there are mountain lions of any color in the Eastern US.