Accentor "Braunelle", "dunnock", a diminutive of "braun", "brown". Accentor The accentors are a genus of birds in the family Prunellidae, which is the only bird family endemic to the Palearctic. This small group of closely related passerines are all in the genus "Prunella". All but the dunnock and the Japanese accentor are inhabitants of the mountainous regions of Europe and Asia; these two also occur in lowland areas, as does the Siberian accentor in the far north of Siberia. These birds are not strongly migratory, but they will leave the coldest parts of their range in winter and make altitudinal movements.
Common ostrich is scarce in dry and hot environment, and this poses a challenge to the ostrich's water consumption. Also the ostrich is a ground bird and cannot fly to find water sources, which poses a further challenge. Because of their size, common ostriches cannot easily escape the heat of their environment; however, they dehydrate less than their small bird counterparts because of their small surface area to volume ratio. Hot, arid habitats pose osmotic stress, such as dehydration, which triggers the common ostrich’s homeostatic response to osmoregulate. The common ostrich is well adapted to hot, arid environments through specialization of excretory