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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.

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  BC AB SK MB ON QC NB NS PE NL YT NT NU SM Canada ATPAT Local Areas N. Areas
List 506 421 388 391 496 458 417 487 358 404 303 323 270 314 668 5222    
Life % 50 50 50 50 50 50 50 50 40 40 40 40 30 40        
Life 253 211 194 196 248 229 209 244 143 162 121 129 81 126 350 1000 150 100
Year % 40 40 40 40 40 40 40 40 30 30 30 30 20 30        
Year 202 168 155 156 198 183 167 195 107 121 91 97 54 94 280 640 120 80
BIGBY % 30 30 30 30 30 30 30 30 20 20 20 20 10 20        
BIGBY 152 126 116 117 149 137 125 146 72 81 61 65 27 63        
Day % 30 30 30 30 30 30 30 30 20 20 20 20 15 20        
BIGBY 152 126 116 117 149 137 125 146 72 81 61 65 27 63        
Wint.Life % 25 20 20 20 25 20 20 20 15 15 15 15 10 15 25      
Winter Life 127 84 78 78 124 92 83 97 54 61 45 48 27 47 167 500    
Wn. Season 114 76 70 70 112 82 75 88 48 55 41 44 24 42 150 450    
1 Winter % 20 15 15 15 20 15 15 15 10 10 10 10 5 10 20      
1 Winter 101 63 58 59 99 69 63 73 36 40 30 32 14 31 134 350    
1 W Season 91 57 53 53 89 62 56 66 32 36 27 29 12 28 120 315    
                                     
Best Years                               800    
Best Days                               640    
Best Wint's                               350    
  TTicks   ABSAT ABA   AOU   N Am   World   Families County USA L48
List 28140   5705   993   2078   1995   10405   237   Combos 1055 907
Life %                                  
Life 4000   1000   500   1000   800   1000   100   180 500 500
Year %                                  
Year 1000   800   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: 506 species - 2011 Checklist of the Birds of British Columbia - Jamie Fenneman
Source AB: 421 species - 2014 Royal Albert Museum: The Official List of the Birds of Alberta
Source SK: 388 species - 2012 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: 417 species - 2014 New Brunswick Bird Records Committee
Source NS: 487 species - 2013 Nova Scotia Bird Society
Source PE: 358 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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