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CANADIAN LISTERS' CORNER LISTING THRESHOLDS
(as of December 31, 2017)
Thresholds for the major areas are those used by the ABA or those gleaned from the sources listed below. Thresholds for Local or Nothern Areas are "normal" areas; large sized areas, counties or county combinations will be higher.

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  BC AB SK MB ON QC NB PE NS NL YT NT NU SM Canada ATPAT Local Areas Northern Areas
List 510 426 393 391 496 458 420 355 487 404 303 323 270 314 668 5236    
Life List % 50 50 50 50 50 50 50 40 50 40 40 40 30 40        
Life List 255 213 197 196 248 229 210 142 244 162 121 129 81 126 350 1000 150 120
Year List % 40 40 40 40 40 40 40 30 40 30 30 30 20 30        
Year List 204 170 157 156 198 183 168 107 195 121 91 97 54 94 280 640 120 80
Bigby % 36 36 36 36 36 36 36 27 36 27 27 27 18 27        
Bigby 184 153 141 141 179 165 151 96 175 109 82 87 49 85        
Day List % 30 30 30 30 30 30 30 20 30 20 20 20 15 20        
Day List 153 128 118 117 149 137 126 71 146 81 61 65 41 63        
Winter Life % 25 20 20 20 25 20 20 15 20 15 10 10 10 15        
Winter Life 128 85 79 78 124 92 84 53 97 61 30 32 27 47 170 500 80 65
Wint. Season % 23 18 18 18 23 18 18 14 18 14 5 5 5 14        
Winter Season 115 77 71 70 112 82 76 48 88 55 14 15 12 42 1670 450 75 60
Single Wint. % 20 15 15 15 20 15 15 10 15 10 5 5 5 10        
Single Winter 102 64 59 59 99 69 63 36 73 40 15 16 14 31 135 350 60 45
Sin. Win. Sea. 92 58 53 53 89 62 57 32 66 36 14 15 12 28 120 315 55 40
                                     
Best Years ATPAT                               800    
Best Days ATPAT                               640    
Best Winters ATPAT                               350    

  Total Ticks ABSAT New ABA Old ABA AOU North America World Families USA Lower 48 County Combinations
List 28154 5705 1103 998 2087 1995 10405 237 1055 907  
Life 4000 1000 500 500 1000 800 1000 100 500 500 180
Year 1000 800 400 400 800 600 800 90     150
The following are the sources I have deemed to be the most up-to-date and definitve available for each province and territory in Canada. Please let me know if you know of a better source. Thanks.
Source BC: 510 species - 2014 Checklist of the Birds of British Columbia - Jamie Fenneman & Rick Toochin
Source AB: 426 species - 2015 Royal Albert Museum: The Official List of the Birds of Alberta
Source SK: 393 species - 2017 Field Checklist of Saskatchewan Birds: Compiled Alan R. Smith and published by Nature Saskatchewan
Source MB: 391 species - 2009 Manitoba Avian Research Committee
Source ON: 496 species - 2017 Ontario Bird Records Committee
Source QC: 458 species - 2016 Le Regroupement QuébecOiseaux
Source NB: 420 species - 2014 New Brunswick Bird Records Committee
Source NS: 487 species - 2013 Nova Scotia Bird Society
Source PE: 355 species - 2014 Nature PEI (Natural History Society of Prince Edward Island)
Source NL: 404 species - 2013 Checklist of the Birds of Newfoundland
Source YT: 303 species - 2009 Yukon Bird Club
Source NT: 323 species - kept previous no source found
Source NU: 270 species - kept previous no source found


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