Recreational birding in the Southeast United States - 2022 Updates (version 2.0, February 2023)
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Total recreational birding activity (by state and year) estimated by the National Survey for Fishing, Hunting, and WIldlife-Associated Recreation was spatially...
由美国鱼类、狩猎与野生动物相关休闲活动全国调查（National Survey for Fishing, Hunting, and Wildlife-Associated Recreation）估算的按州和年份统计的休闲观鸟活动总量，在空间层面上……
