If you read Kiwi, you've seen the link to this already, but for those of you who don't:
Animals Have Problems Too. Single-panel webcomic. Almost Zen in its simplicity, and way funnier than it should be.
I would submit that one of the entries that should be added is "The pigeons can't find a private place to have sex." Because dude, we are listening to them go at it right outside our apartment all the time lately.