The website "Sad and Useless" has a bunch of pictures labeled "Pigeons Make The Laziest Nests!"
I may be slightly jaded, but my first thought when looking at the pictures was: "Those are IT-pigeons: Minimum Viable Product".
If the pigeons are a certain type of Free Software/Open Source zealot they would be going "Not happy with the nest? When you hatch, send a patch".
Thank you, I'll be here all week.