Bald-faced hornet to laying eggs while the workers take over all other necessary housekeeping tasks. At some point, sometime before the midpoint of colony life, the colony will begin to invest energy in producing reproductives as well. This marks the transition into the reproductive stage. There is an extensive time period where both workers and reproductives are raised. Production of both castes limits the size of the work force. However, an early switching time is highly adaptive for social wasp colonies in limiting the risk of total loss. In a sampling of 50 colonies taken in Maryland in 1977, workers were produced
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