I am amused that this is the first set of your notes that I was able to follow easily. I expect that says much about me.

"many animals practice forms of birth control through vaginal plugs, defecation, abortion through the ingestion of certain plants..."

Re-absorbtion of fetuses, eating their young or killing those of others, at least some (kangaroos, for one) have the ability to put a pregnancy "on hold" at an early point if circumstances are poor ...

Wait, symbolic communication by honeybees?

There's some data out there on the "dances" honeybees returning with nectar do to guide others members of the hive to where they were. At least as interpreted by humans, it's pretty abstract, though I'm rather fuzzy from what little I've read on how well we're interpreting.

Also I am in an amazingly good mood now.

Yay!