BBC's 'Mammals' [0] spends a portion of one of its episodes discussing the plight of howler monkeys in Costa Rica. [1] These monkeys die frequently to electrocution as urbanization continues. The power lines look like reasonable crossing routes above the dangerous and hostile human world. The solution they implemented was to build canopy bridges safe for the monkeys.

This isn't cost efficient but it's the right thing to do. Wouldn't it be nice if we could call it the humane thing to do? In general, "humane" seems to stop with human lives, despite the fact that we like to style ourselves caretakers of this planet.

[0] https://www.bbcearth.com/shows/mammals

[1] https://www.bbc.co.uk/programmes/articles/5ZpLHZzWv93X70kvP2...