Pigeons -- flying rats, rock doves, what have you -- are probably not on anyone's favorite list of fowl, but lately they've been bringing the house down. Well, not houses exactly, but bridges and awnings if you believe the news. Last year it was reported pigeon poop helped cause the bridge collapse in Minnesota -- pigeon excreta being remarkably effective at rusting things out. Now, at a Yuma, Arizona gas station, an awning collapsed under the weight of wet guano. The folks in charge let up to five inches of dung collect on the flat awning, and when it rained, the mass of that mess brought the whole thing tumbling down. Lost in the hail of excrement: a BMW and a HUMMER. Let this be a lesson to you: beware the Columbidae.

[Source: MSNBC]