Black brow snake
Black brow serpent: a large snake with a full length of 2000mm. The back of the head is yellowish green or brownish gray, there are obvious black stripes behind the eyes, and there are black trapezoid or butterfly markings in the front and middle of the body. After the middle part of the body, there are obvious black longitudinal bands on both sides to the tail end.
Distribution: widely distributed in Tianjin, Shanghai, Shanxi, Zhejiang, Jiangsu, Anhui, Fujian, Taiwan, Jiangxi, Hubei, Hunan, Hainan, Guangxi, Chongqing, Sichuan, Guizhou, Yunnan, Xizang, Gansu and other places. Beijing area is widely distributed in various districts and counties.
Habitat: living in vast areas of mountains, hills and plains, often living in and near houses, especially in the eaves, walls and holes of ancient houses, feeding on rats and birds.
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Abnormal estrus in dogs
First, the estrus period of short estrus dogs is very short, it is not easy to observe, and the opportunity for mating is often missing. the reason may be that the follicles mature and ovulate quickly, which shortens the estrus period, or it may be that the follicles suddenly stop developing and atrophy, and stop secreting estrogen. the exact reason for short estrus is not clear. Second, intermittent estrus is common in malnourished bitches, estrus is intermittent, and the process of estrus lasts for a long time. Most of the reasons are that the follicles develop alternately due to the insufficient secretion of luteinizing hormone.
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White Raccoon Dog and Breeding of White Raccoon Dog
White raccoon dogs and their characteristics Raccoon dogs in nature have always been blue-brown, this common color type is genetically called wild type. In 1974, Harbin Zoo in Heilongjiang Province acquired a rare male raccoon dog (eyes and snout are light pink). In 1980, white raccoon dog or white raccoon dog with yellow brown or light blue eyes and black snout was successively found in the domestic raccoon dog population in three provinces of Northeast China. These special color types different from wild type fur color were called mutant types. Institute of Specialty of Chinese Academy of Agricultural Sciences
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