User:User220404/Brush rabbit

Original Work: (Reproduction)

The brush rabbit's breeding season varies from north to south. In Oregon, breeding begins in February and ends in August, while in California it begins in December and ends in May or June. Litter size also varies between regions. Studies ha found the average litter size in Oregon to be 2.8, in northern and central California to be 3.5, and in west central California to be 4.0. The brush rabbit is one of the less fecund members of the genus, producing about 15 young in five to six litters per year. The gestation period of the brush rabbit female is about 22 days, and kits are altricial.

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Male brush rabbits breed from around October to November through June to July. The brush rabbit's most reproductive activity occurs from January to April. In the areas of San Francisco, pregnant female brush rabbits can be found from the first week of December until the ends of June. Gestation periods last about four weeks. Female brush rabbits have about four litters per year. Three litters if a female brush rabbit lives through the entire breeding season.

Reproduction
Male brush rabbits breed from around October to November through June to July. The brush rabbit's most reproductive activity occurs from January to April. In the areas of San Francisco, pregnant female brush rabbits can be found from the first week of December until the ends of June. Gestation periods last about four weeks. Female brush rabbits have about four litters per year. Three litters if a female brush rabbit lives through the entire breeding season.

Subspecies
Three geographic subspecies of the brush rabbit are acknowledged as follows.

Sylvilagus bachmani tehamae
This subspecies of Sylvilagus bachmani is geographically found from the Rogue River Valley, Jackson County, Oregon, through Northern California, along the inner coast ranges, to southern Lake County and along the Sierra Nevada to Placer County. It is also found in the Sacramento Valley.

The subspecies, relative to the Sylvilagus bachmani, is medium in size, paler in color, has larger ears and shorter hind feet.

Sylvilagus bachmani macrorhinus
This subspecies of Sylvilagus bachmani is geographically found west-central California--from San Francisco to the north end of Monterey Bay and inland from Solano County south to Santa Clara County.

Relative to the Sylvilagus bachmani, it is smaller in size but has longer ears.

Sylvilagus bachmani riparius
This subspecies of Sylvilagus bachmani is geographically found on the west side of the San Joaquin River in northern Stanislaus and southern San Joaquin counties.

The subspecies riparius is pale and gray-sided.

Endangerment (riparius)
The Sylvilagus bachmani riparius is listed as an endangered species both by California and federally primarily due to habitat destruction. In the San Joaquin Valley, over 93% of the habitat was destroyed for urban and agricultural use.