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The genus Centris contains circa 250 species of large apid bees occurring in the Neotropical and Nearctic realms, from Kansas to Argentina.Most females of these bees possess adaptations for carrying floral oils rather than (or in addition to) pollen or nectar.
Commonly uses small rodent nests, may use bird cavity nests. Small umbrella-shaped papery combs hanging horizontally in protected spaces such as attics, eaves or soil cavities. Large paper nest, upside down pear shaped, hanging from branches and eaves; also barns and attics.
The pre-flight warm-up behavior of a moth. Insect thermoregulation is the process whereby insects maintain body temperatures within certain boundaries.Insects have traditionally been considered as poikilotherms (animals in which body temperature is variable and dependent on ambient temperature) as opposed to being homeothermic (animals that maintain a stable internal body temperature ...
Allen's rule - Hare and its ears on the Earth [1]. Allen's rule is an ecogeographical rule formulated by Joel Asaph Allen in 1877, [2] [3] broadly stating that animals adapted to cold climates have shorter and thicker limbs and bodily appendages than animals adapted to warm climates.
An ectotherm (from the Greek ἐκτός (ektós) "outside" and θερμός (thermós) "heat"), more commonly referred to as a "cold-blooded animal", [1] is an animal in which internal physiological sources of heat, such as blood, are of relatively small or of quite negligible importance in controlling body temperature. [2]
In birds, the kidneys are not solely responsible for osmoregulation. A unique feature in birds is the lower intestine, which absorbs fluids and electrolytes that were not absorbed by the small intestine or the kidneys. [37] These osmoregulatory adaptations allow the common raven to thrive in diverse habitats.
An insect uses its digestive system to extract nutrients and other substances from the food it consumes. [3]Most of this food is ingested in the form of macromolecules and other complex substances (such as proteins, polysaccharides, fats, and nucleic acids) which must be broken down by catabolic reactions into smaller molecules (i.e. amino acids, simple sugars, etc.) before being used by cells ...
The food reserves gathered in the day are generally sufficient for only one night. [1] When the bees exhaust their food, they enter torpor and cease to incubate. [1] Occasional periods of semi-starvation lasting for a day or two do not harm the colony. [1] The bees simply become drowsy and remain in a state of suspended animation. [1]