Unverified50% confidenceFactExact time

Before European colonizers arrived, North America had 100 million to 400 million beavers.

1

Sources

50%

Confidence

Long-term

Relevance

9/7/2026

First Seen

Sources

Artificial Beaver Dams Boost Juvenile Coho Salmon Survival Rates from 8% to 60%

Related Entities

海狸species North Americalocation

Related Claims

Unverified目前北美野牛总数恢复至约50万头，但真正生活在野外具有自由迁徙能力的野生种群仅约3万头61% similar Unverified历史上北美大平原曾有约6000万头野牛，19世纪后半叶因商业猎杀、铁路建设和政策性屠杀骤降至约一千多头60% similar Unverified商代（约公元前1600-1046年）目前已发现约15万片甲骨，记录了约4500个不同字符50% similar

Cite This Claim

Stable URI

https://kongchang.com/claim/870326

API

curl https://kongchang.com/api/v1/knowledge/claims/870326

MCP

get_claim(id=870326)