Mayflies and muffleheads are two different types of flying friends that inhabit CP because of the lagoons. The muffleheads are about 1 centimeter in length, and they look like they have fuzz around their heads. They fly in these tremendous swarms, that always seemed to be aimed at me when we were waiting for the train to get past the gate. :)
Mayflies, on the other hand, are about 1.25" long, and they cling to everything rather than fly -- they cling to walls (especially around restrooms), and they're all over the ground around lights. They honestly look like bait! :) They have the really long wings and are harmless (so are muffleheads, for that matter).
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PO!NT OF VIEW - A Different Look at Roller Coasters
http://www.crosswinds.net/~justmayntz/thrills/