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The legs and feet are grey, as are the scales but those have a darker coloring. In juveniles, the irides are a darker brown and the bill, feet, and legs are described as horn-grey. [8] The adults are colored black from the head to the throat and breast, and from the belly to undertail coverts and thighs.
Hoplocampa flava is known to nest in the flowerbuds of plum, cherry plum, cherry, apricot, or sloe.Adults will plant eggs in the buds, following the hatch the larvae burrow into the developing fruits because of this the fruits secrete a oozy substance and prematurely fall off the flower.
The adults have an annual survival rate of 0.66 and the average length of a generatio is 2.89 years. [2] They typically nest in holes or fissures, sometimes excavated by other species. This includes holes in trees and sometimes abandoned beehives that are a height of around 0.5-2m from the ground. [ 3 ]
The species is distinguishable by its light coloring, unique single comb nests, and nocturnal nature. [1] A notable feature of this species is the size dimorphism between queens and workers. Unlike most Vespidae wasps, Apocia flavissima queens are smaller than their worker counterparts which results in unique intraspecies relationships.
Nest complexity is roughly correlated with the level of parental care by adults. Nest building is considered a key adaptive advantage among birds, and they exhibit the most variation in their nests ranging from simple holes in the ground to elaborate communal nests hosting hundreds of individuals.
The adult female bees then enter the cells and deposit the parasitic larvae in the vicinity of their own brood. It has been hypothesized that these parasites, and their proclivity for food theft, have acted as a selective pressure for A. dawsoni to produce smaller males (minors), which require less food, thus explaining the preponderance of ...
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This species was described by Thomas Say in 1831. Rau referred to this species as Polistes pallipes or P. fuscatus pallipes in a number of his publications. [8] [9] However, references to P. metricus as either P. pallipes or P. fuscatus pallipes are due to confusion with a dark morph of P. fuscatus, so the name P. pallipes is rather retained as a synonym of P. fuscatus and not of P. metricus.