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
Gregory Bald Gregory Bald Gregory Bald is a mountain in the Great Smoky Mountains. It has an elevation of 4,949 feet (1,508 meters) above sea level. The mountain's majestic summit makes it a popular hiking destination. Another feature that attracts many visitors are the flame azaleas that bloom over the bald every summer. The azaleas reach peak bloom around mid-to-late June. Gregory Bald is located along the Tennessee-North Carolina border, between Blount County and Swain County. It rises appx. 3,000 feet above its northern base in Cades Cove, and appx. 3,300 feet above its southern base at Fontana Lake. The mountain is