I was having a conversation about characters from various childhood shows.

I always thought that Oscar the grouch didn’t make any sense. Why would you live in a bin?

But it occurred to me that maybe the Grouch evolved to hunt like a trapdoor spider, they hunt mainly racoons but also cats and anything else that happens into their bin.

Initially forest dwelling, with the rise of human civilisation; they have become adapted to living in cities which afford many pre-made “burrows” (bins). The lure of easy food, brings their prey to them.