Dung beetle. You need snowballs, snowballs disappear when the gates are open.
Bees, they don't appear if you shake trees (They are replaced by coins) when the gates are open.
I remember long ago me and my friend were looking for the bug you find while shaking trees (not the spider, and the bees), and we couldn't find it on wifi. It just might of been some really bad lucky, I am not sure. I can't remember what the bug was sorry. EDIT: Ah googled it, it was the bagworm.