Sap Bucket Beetle
Feb. 4th, 2009 05:48 amI didn't want to post a lot of natural history information with my 365 Urban Species "reminders," because it's there in the original post, but I guess a quick note wouldn't hurt:
Sap bucket beetles ARE fireflies, but they have lost the trait of bioluminescence through evolution, and mate in the daytime. This change in behavior has turned out to be an advantage over their lit-up cousins. Fireflies are rapidly disappearing from urban areas because light pollution makes it impossible for them to court and reproduce; if you find a firefly in the city, chances are good that it's actually a sap bucket beetle. Check the abdomen to be sure--a true firefly will have a light colored segment where the bioluminescence occurs. Often sap bucket beetles are called "diurnal fireflies," a common name which verges on being an oxymoron.
Sap bucket beetles ARE fireflies, but they have lost the trait of bioluminescence through evolution, and mate in the daytime. This change in behavior has turned out to be an advantage over their lit-up cousins. Fireflies are rapidly disappearing from urban areas because light pollution makes it impossible for them to court and reproduce; if you find a firefly in the city, chances are good that it's actually a sap bucket beetle. Check the abdomen to be sure--a true firefly will have a light colored segment where the bioluminescence occurs. Often sap bucket beetles are called "diurnal fireflies," a common name which verges on being an oxymoron.