There's no love stronger than the love of a parrot for its watermelon.

Or, as Cute Overload put it, Love is Rind:

http://cuteoverload.com/2011/01/03/love-is-rind/

Searching for "Watermelon Bird" surfaces this lovely poem by Eric Ode:

So be on guard in your backyard, when in the shade you sit.

Enjoy the watermelon, but be careful where you spit.

See also the Angry Birds Watermelon in my watermelon kegger post...