🐻Bears
熊即熊科(学名:Ursidae)动物的通称,是一种大型哺乳類,属于食肉目。目前该科共有六属八种,除非洲(阿特拉斯棕熊已於1870年滅絕)及大洋洲與南極洲已無現生野外種群外,广泛分布于北半球和南半球的部分地區。 常见的特征是身躯庞大、四肢粗壮有力、长鼻子、厚毛发、短尾、跖行足、每只脚爪上有五个弯曲锋利不能回缩的爪子(对比猫科动物的爪子是可以回缩的)。北极熊基本是食肉动物,大熊猫以竹子等植物为主食,但偶尔也会食肉,其他的熊都是杂食动物。 除去母亲带小熊的情况,一般是独自行动。昼出夜伏,不过也会在夜晚或黎明活动,特别是在人类附近的时候。嗅觉极其灵敏,看似笨拙,实际奔跑速度极快,时速可达40km/h,耐力超群,而且可以适应各种气候和地形。秋天時,熊吃了发酵的果子会表现出醉态。熊需要一个掩蔽所,如一个山洞或树洞,以供冬季在其中冬眠,冬眠有时会长达100天。 史前人类就有捕猎熊的历史,为了获取它们的肉和毛皮。它们的形象经常出现在神话传说、文学、艺术中。但在现代社会,因为栖息地减少和非法的熊制品贸易,熊面临着灭绝的压力。有六种熊处于危险至濒危级别,棕熊在有些地区已经灭绝。
Text: Wikipedia, CC BY-SA 4.0.
The Red List assesses individual species. Each animal in this group has its own status.
- Body mass
- 152 kg
- Body length
- 1.75 m
- Shoulder height
- 0.92 m
- Top speed
- 43 km/h
- Bite force
- 1,436 N
- Maximum lifespan
- 40 years
Everything we know about Bears
Typical adult figures. Where a value is an estimate rather than a measurement, it says so.
Body mass152 kgaverage46–372 kg · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Body length1.75 maverage1.31–2.29 m · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Shoulder height0.92 maverage0.68–1.45 m · range across the groupaggregated across membersDetails ↓Hide ↑
range across 7 member species
Top speed43 km/haverage39–47 km/h · range across the groupaggregated across membersDetails ↓Hide ↑
range across 2 member species
Bite force1,436 Naverage751–2,121 N · range across the groupaggregated across membersDetails ↓Hide ↑
range across 2 member species
Brain mass333 gaverage243–476 g · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Maximum lifespan40 yearsaverage34–50 years · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Generation length12 yearsaverage9.99–16 years · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Age at maturity4.5 yearsaverage1,015–2,413 days · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Gestation151 daysaverage91–226 days · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Litter sizeabout 2average1.1–2.46 · range across the groupaggregated across membersDetails ↓Hide ↑
range across 8 member species
Home range12,937 km²average0.7–77,270 km² · range across the groupaggregated across membersDetails ↓Hide ↑
range across 6 member species
Population density0.32 per km²average0.01–1.21 per km² · range across the groupaggregated across membersDetails ↓Hide ↑
range across 6 member species
average = a mean across sexes or species in a group.
Family tree
- classMammals · Mammalia
- superorderLaurasiatheria
- orderCarnivorans · Carnivora
- suborderCaniformia
All 12 branches ↓Fewer branches ↑
- kingdomMetazoa
- phylumChordata
- subphylumCraniata
- subphylumVertebrata
- superclassGnathostomata
- superclassSarcopterygii
- superclassTetrapoda
- classMammals · Mammalia
- subclassTheria
- superorderLaurasiatheria
- orderCarnivorans · Carnivora
- suborderCaniformia
More about Bears
镜头下的动物
站内动物的实拍影像——捕猎、打斗,还有各自过日子的样子。
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