December 20, 1950: Don't you know, about the bird?

This rather straight-forward and pointless strip is notable for being the first appearance of a bird in Peanuts.  It looks quite different from Woodstock later on.

Woodstock originated as a hachling from a bird that built its nest on Snoopy's stomach as he lay atop his dog house.  The mother bird, if my memory holds up, looked fairly realistic, a lot like this one.