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In terms of size variation, red-tailed hawks run almost contrary to Bergmann's rule (i.e. that northern animals should be larger in relation than those closer to the Equator within a species) as one of the northernmost subspecies, B. j. alascensis, is the second smallest race based on linear dimensions and that two of the most southerly ...
Kleiber's law states that the metabolic rate (q 0) of an animal is the mass of the animal (M) raised to the 3/4 power: q 0 =M 3/4. Therefore, the mass of the animal increases at a faster rate than the metabolic rate. [21] Herbivores employ numerous types of feeding strategies.
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The taxonomy of the Cyanea species is not fully agreed upon; some zoologists have suggested that all species within the genus should be treated as one. Two distinct taxa, however, occur together in at least the eastern North Atlantic, with the blue jellyfish (Cyanea lamarckii Péron & Lesueur, 1810) differing in color (blue, not red) and smaller size (10–20 cm [3 + 7 ⁄ 8 – 7 + 7 ⁄ 8 ...
The animals made slightly different sounds when communicating with different individual bats, especially those of the opposite sex. [227] In the highly sexually dimorphic hammer-headed bat (Hypsignathus monstrosus), males produce deep, resonating, monotonous calls to attract females. Bats in flight make vocal signals for traffic control.