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Note to Potential First timers 531

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发表于 2016-6-22 22:21:41 | 只看该作者 回帖奖励 |正序浏览 |阅读模式
The National Audubon Society's (NAS) longest running wintertime tradition, the annual Christmas Bird Count (CBC), will take place throughout the Americas from Sunday, December 14, 2014 to Monday, January 5, 2015.
There will be at least 12 Christmas Bird Counts in West River SD and Black Hills of Wyoming, 10 of which are official counts that contribute data to the National Audubon Society's (NAS) database.
Each Christmas season tens of thousands of volunteers will count and record each individual bird and bird species they encounter during one calendar day, within a 15 mile diameter circle. The results are compiled into the longest running database in ornithology, representing over a century of unbroken data on trends of early winter bird populations across the Americas. The censuses provide valuable data about the number of bird species and numbers of each species occurring within set geographic areas on an early winter day.
Last year's count (114th Count) again shattered records. For the fifth count season in a row there were more counts and more observers included than ever before. In terms of the number of counts included, at 2408 circles completed, regardé à lintérieur et a vu un homme couvert de sang À la suite de ces derniers changements the 114th season bested the 113th by 39, including 1863 in the United States, 438 said he had no intention of resigning in Canada, and 107 in the Caribbean, Latin America, and Pacific Islands. This number was bolstered by 56 new counts (20 in Canada, 30 in the United States, and 6 elsewhere). The 114th Count set a new record level of total number of observers, with 71,659 (60,969 in field plus 10,690 at feeders) just besting last season's short standing record
This fall, the National Audubon Society released a ground breaking study looking at the future of bird conservation and of the status of nature in the century to come. Audubon's Birds cure mediche and Climate Change Report; 314 Species on the Brink is the first study incorporating Christmas Bird Count data to present predictive, quantitative analyses of how bird species are likely to fare over the next century in the face of climate change. In a nutshell, of 588 species of North American birds sampled by the CBC or the Breeding Bird Survey, 314 are considered to be "climate threatened" or "climate endangered", meaning that they will likely need to move elsewhere or adapt to a less suitable climate. Many familiar species including a host of "state birds" are included on this list. This study is uniquely comprehensive, and is only the initial presentation of a series of analyses of similar vein. While of significant concern for many species, the results are also a call to action for both future bird conservation plans (including planning for Important Bird Areas) and strategies to ameliorate climate change catalysts on local, national, and international levels. And each and every Christmas Bird Count observer on all counts over the past 114 years has played an important role in helping define the future course of action to address the concerns of global climate change on the environment we share with birds and other wildlife.
Note to Potential First timers: Christmas Bird Counts are open to birders of all skill levels. While there is a specific methodology to the CBC and you need to count birds within an existing Christmas Bird Count circle, everyone can participate! If you are a beginning birder, on most counts you will be able to join a group that includes at least one experienced birdwatcher. Feeder watchers and backyard watchers are needed too.
  
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