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Megalopta is a widespread neotropical genus of bees in the tribe Augochlorini in family Halictidae, known as the sweat bees. [1] They are the largest of the five nocturnal genera in Augochlorini. Most have pale integumentary pigmentation, and all have large ocelli , most likely a feature of their nocturnal behavior. [ 2 ]
Eucera have a thick layer of fur and are dark in color. They have a protuberant clypeus and are typically around 0.4 to 0.7 inches long. [ 3 ] The size of bees in the genus Eucera range from 11 to 18 mm. [ 4 ] When emerging from nests, an immature Eucera nigrilabris male will be somewhat red in color and a bit sluggish.
Foraging at extreme distances wears out the wings of individual bees, reduces the life expectancy of foraging bees and therefore the efficiency of the colony. The minimum temperature for active honeybee foraging is approximately 55 °F (13 °C). Full foraging activity is not achieved until the temperature rises to 66 °F (19 °C).
Some crepuscular animals may also be active by moonlight or during an overcast day. Matutinal animals are active only after dawn, and vespertine only before dusk. A number of factors affect the time of day an animal is active. Predators hunt when their prey is available, and prey try to avoid the times when their principal predators are at large.
Halictidae is the second-largest family of bees [1] (clade Anthophila) with nearly 4,500 species. [2] They are commonly called sweat bees (especially the smaller species), as they are often attracted to perspiration. [3] [4] Halictid species are an extremely diverse group that can vary greatly in appearance.
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A bee swarm. Bees are unaggressive in this state, since they have no hive to protect. Unlike most other bee species, western honey bees have perennial colonies which persist year after year. Because of this high degree of sociality and permanence, western honey bee colonies can be considered superorganisms. This means that reproduction of the ...
A bumblebee (or bumble bee, bumble-bee, or humble-bee) is any of over 250 species in the genus Bombus, part of Apidae, one of the bee families. This genus is the only extant group in the tribe Bombini, though a few extinct related genera (e.g., Calyptapis) are known from fossils.