Happy Smurf Day sez, "I ran across these weird mossy patches on some trees near the border of Mexico and Arizona. Upon closer inspection they turned out to be thousands of spiders clustered together."

Indeed they are. I love spiders, really and truly I do, but SQUICKSQUICKSQUICK.

Mass of Daddy Long Legs in a Tree

(Thanks, Happy Smurf Day! via Submitterator)