It can look almost that bad overnight if you park under one of the trees in west Houston. For some reason they seem to love supermarkets.
After a rainstorm maybe. That car doesn't look like it has Texas plates though.
As a parrot owner, I can tell you birds will poop every 15-30 minutes they are awake and are most likely to go right before they take off. It makes sense when you think about it - they are lightening their weight just before they have to sustain it in flight. You can also potty-train birds in a limited way so there are designated places to poop in the home and they can be taught to use those places.