PLAN OF THE SPECIES ACCOUNTS 



The sequence and names of genera and species follow the A.O.U. 

 Check-list of North American Birds (1957) and the Thirty-second 

 Supplement of the Check-list (American Ornithologists' Union 1973). 

 Each species is introduced b}^ its scientific name, followed by the 

 common name. At the beginning of each species account I have listed 

 recent specimens from Jackson County under the heading, "Speci- 

 men (s)." Specimens reported in recent literature are cited within the 

 text of the species account. Photographs are cited under the heading 

 of 'Thotograph(s)" to document the occurrence of certain species. 

 Data listed under "Photograph (s)" and/or "Specimen (s)" include 

 location, sex (specimens only), date, and if photographs exist, initials 

 of the photographer. Important literature is cited and records outside 

 Jackson County, especially from west of the Cascade Mountains in 

 Oregon, are mentioned. References to Christmas Bird Counts (ab- 

 breviated CBCs) are made in some of the species accounts. 



Terms indicating frequency of occurrence of species are often vague 

 or misleading. In an effort to standardize terminology and reduce 

 subjectivity, I have adopted the system developed by Arbib (1957:63- 

 64). 



In all instances of abundance I have chosen to use the nonbreeding 

 abundance scale (Arbib 1957:63-64) due to the lack of sufficient 

 quantitative data on breeding bird numbers; the abundance scale as 

 used here thus refers to both breeding and nonbreeding species. 



Abundance Scale 



Abundant. Occurring in such numbers that a competent observer, 

 in a single day, at the appropriate time and place (=habitat), might 

 see or hear more than 500 individuals. 



Very common. 101 to 500 individuals in a single day. 



Common. 26 to 100 in a single day. 



Fairly common. 6 to 25 in a single day. 



Uncommon. One to five in a single day and no more than 25 per 

 season. 



Rare. One to five in a single day and no more than five per season. 



Very Rare. No more than one per day and no more than one per 

 season. 



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