Bald-faced hornet hydrocarbons serve as a barrier to moisture diffusion and thus prevent dehydration in wasps. Cuticular hydrocarbon profiles vary over species and nests, and so cuticular hydrocarbons are a proposed mechanism for nest-mate recognition. Worker and queen cuticular lipids have similar components, but their distributions differ dramatically, implying that cuticular hydrocarbons also play a role in caste differentiation. The following lipid profiles were determined from specimens collected in the summer and early fall of northeastern Georgia in 1989. The dominant hydrocarbons recovered from the cuticles of workers were n-alkanes and methyl branched and dimethyl branched alkanes with a C27 or a
Bald eagle its common and specific scientific names from the distinctive appearance of the adult's head. "Bald" in the English name is derived from the word "piebald", and refers to the white head and tail feathers and their contrast with the darker body. The genus name is New Latin: "Haliaeetus" (from the ), and the specific name, "leucocephalus", is Latinized () and (). The bald eagle was one of the many species originally described by Linnaeus in his 18th century work "Systema Naturae", under the name "Falco leucocephalus". There are two recognized subspecies of bald eagle: The bald eagle forms a species