Beware Tree-Dwelling Bovines

I cut the back lawn today, and we were spending some time back there playing in the dirt. The sun was shining, the breeze was blowing, the birds were chirping - at least, I think they were birds. Every time an (alleged) bird chirped, sean pointed to a nearby tree and said "a cow, a cow!" It was half anouncement and half question, as though he were looking for confirmation. Needless to say, Lori and I were somewhat amused. We tried to correct him. I said "it's not a cow, Sean." He thought for a minute, cocking his head, and replied confidently - "a pig, a pig!" The whole event was humorous enough to inspire me to draw this simple comic to commemerate the occasion.