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RESIDENT BIRD COUNTS 1994

机译:1994年居民伯德伯爵

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摘要

A total of 186 studies and censuses are included in this supplement (a slight decrease from the 193 published last year). This year's counts come from 32 states, two Canadian provinces, and the District of Columbia. Pennsylvania has the most counts with 35, followed by California with 21 and New York with 17. Included here are a total of 28 plots being published for the first time, but coincidentally, there are also 28 plots that have been studied for 20 years or longer. There are no changes in the way the data are reported this year. For the Winter Bird Population Study (WBPS), the first value following each species is the average number of individuals encountered per visit (rounded to the nearest tenth), and the value in parentheses is the number of visits during which the species was encountered (frequency). For the Breeding Bird Census (BBC), the first value following each species is the number of territories (rounded to nearest half territory), and the value in parentheses is the number of territories per 40 ha (density). Densities are only calculated for species with three or more territories. A " + " after a species indicates that less than one-quarter of the species' territory occurred on the plot. The number of nests or fledglings observed is indicated by an N or FL, respectively, in parentheses after the species name.
机译:此补编总共包括186个研究和普查(与去年发布的193个相比略有减少)。今年的数据来自32个州,加拿大的两个省和哥伦比亚特区。宾夕法尼亚州的总数最大,为35个,其次是加利福尼亚州的21个,纽约州的17个。其中包括首次公开发布的总共28个地块,但巧合的是,还有28个已经研究了20年或20年的地块。更长。今年的数据报告方式没有变化。对于冬季鸟类种群研究(WBPS),每个物种之后的第一个值是每次访问所遇到的平均个体数量(四舍五入到最接近的十分之一),括号中的值是遇到该物种的访问次数(频率)。对于繁殖鸟类普查(BBC),每个物种之后的第一个值是领地数量(四舍五入到最接近的一半领地),括号中的值是每40公顷(密度)的领地数量。仅针对具有三个或更多领土的物种计算密度。物种后的“ +”表示该地块上发生的物种不到四分之一。在物种名称后面的括号中,分别以N或FL表示观察到的巢或雏鸟的数量。

著录项

  • 来源
    《Journal of Field Ornithology》 |1995年第sup期|p.3-4|共2页
  • 作者

    James D. Lowe;

  • 作者单位

    Cornell Laboratory of Ornithology 159 Sapsucker Woods Road Ithaca, New York 14850;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 鸟纲;
  • 关键词

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