This is an interesting overview of the eight existing bear species on earth. Human impact on habitat and climate are obviously beg factors hurting bears.

One note is that the audiobook narrator made some weird errors that actually had me looking up whether this was read by AI, but it was a real person. It didn't ruin the book for me, but I did think it was strange that nobody caught this. A few examples: The year 1254 was read "twelve thousand 54" and the year 2100 was read, "two thousand one hundred." The word archipelago was read incorrectly once, and correctly a few other times. The Thames River was mispronounced.