Account
What the sources say about this taxon, as written.
biology_ecology · 
Plazi
Movements, Home range and Social organization. The Northern Pika moves aboveground by running and leaping openly. Its sunbaths for shorter periods of time than the Alpine Pika or the Turuchan Pika; in general, the Northern Pika is more anxious than the other two species. Home ranges are 2100-5500 m?. Home ranges of males and females overlap. Densities are 300-2500 ind/km?, but can be as low as ¢.5-50 ind/km?® in peripheral settlements. Areas occupied are marked with old hay piles and latrines. The Northern Pika has well-developed vocalizations. Along with alarm calls, it has a song, and some of its elements are used in roll calls. Calls have clear social implications.
activity · Plazi
Activity patterns. The Northern Pika is diurnal and avoids midday heat and windy periods. During polar days, the Northern Pika is not active at night. The Northern Pika is easily visible, having high acoustic activity. During winter, Northern Pikas emerge aboveground only on sunny, calm days; they spend remainder of their time under snow.
discussion · Plazi
According mtDNA and nDNA, O. hyperborea belongs to subgenus Pika. Taxonomic status of O. hyperborea as a species and of some taxa included herein was discussed for a long time. Ochotona hyperborea was included in O. alpina by several authors. Taking into account sympatry between these species and difference in chromosomes, two species were separated; however, svatoshi was listed as a subspecies of O. alpina in several checklists. Ochotona turuchanensis also was separated from O. hyperborea . The nominate subspecies of O. mantchurica again was considered a subspecies of O. hyperborea . Modern studies of morphology, genetics, and bioacoustics support composition of the species considered here. All of this taxonomic confusion required careful attention to published data on ecology. Ochotona hyperborea is closely related species to O. mantchurica and O. hoffmanni ; these three species correspond to allospecies. One of the best taxonomical markers, correlated with genetic variation is bioacoustics. Several types of calls have distinct geographical variation. According to morphological study it includes cinereoflava, cinereofusca, davanica, ferruginea, kolymensis, litoralis, minima, naumouvi, normalis, shamani, stenorostrae, svatoshi, uralensis, yesoensis, and yoshikurai. Ochotona hyperborea is sympatric with O. alpina within Western and Eastern Sayan Mountains, Khangai Upland, and Tannu Ola Range (Tuva, Russia); sympatric with O. turuchanensis in the Putorana Plateau and adjacent regions of the central Siberian Plateau in the Nizhnyaya Tunguska River Basin. Eight subspecies recognized.
description · Plazi
Description.— Pikas of the C genetic lineage; southern acoustic race. Specimens of O. h. cinereofusca can be distinguished from O. h. cinereoflava on the basis of genetic traits only. Differences with another spatial neighbor O. h. fedoseevi include the shape of the frequency modulation curve of alarm call ( Fig. 6 ).
description · Plazi
Description.— Pikas of the B genetic lineage; northern acoustic race. The majority of the representatives of this subspecies (except for pikas from the Ural Mountains) have a clear V-shaped parietal suture ( Fig. 5B ). Accordingly, besides genetic identification, this subspecies can be distinguished from neighboring O. h. hyperborea by the shape of the parietal suture of the skull ( Fig. 5 ). There are differences in the shape of the frequency modulation curve of alarm call with another spatial neighbor— O. h. cinereoflava ( Fig. 6 ).
iNaturalist
xeno-canto