Annual Ottawa area butterfly count

The North American Butterfly Association has coordinated butterfly counts following the same format as Christmas Bird Counts for many years. These counts are published as part of an ongoing program of NABA to census the butterflies of North America (more information).

Volunteer participants focus on a 24-km-diameter circle and conduct a 1-day census of all butterflies sighted within that circle. The OFNC count area centres at Manion Corners (SW of Ottawa), a site used as a former non-OFNC count circle. It includes several important butterfly areas such as the Long Swamp and the Burnt Lands Alvar.

Results of the current and past counts

Excel version: 2017 | 1998-2017

Note: CW = count week, i.e., not seen on the day of the count, but during that week, on the day given.

Shaded numbers are highest count for that species.

Species 1998 1999 2000 2001 2002 2003 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Black Swallowtail   1   CW
July 7
CW
July 14
  3 2   3 CW
July 5
12 2 2 1   1
Canadian Tiger Swallowtail   3       2   2 5 1 2       1    
Eastern Tiger Swallowtail                   4 5 7 6 8 7 11 5
Giant Swallowtail                           1 2  
Mustard White 2 8 11 8 3 1 6 7 26 2 4 1 10 109 26 11 2
Cabbage White 3 8 15 38 10 10 18 208 172 92 106 28 566 464 138 13 27
Clouded Sulphur 3 5 17 35 15   128 33 35 142 32 180 295 255 60 112 2
Orange Sulphur       CW
July 7
    1 3   3   32 3 4 4 2 1
Harvester 1 2 1 2     1     3 1   1 1      
American Copper             1 1 3   1         3  
Bronze Copper   1   1   3 2 3 30 5 14 7 3 6 5 2 5
Coral Hairstreak       3       2   2   2   5 4 1 1
Acadian Hairstreak 8 1   5 CW
July 14
  3 1   5 4 26 32 30 80 1  
Banded Hairstreak 3             8   6 10 1 9 17 6    
Striped Hairstreak   1         2 1     1 2 6   3 1  
Hickory Hairstreak               CW
July 4
1                
Eastern Tailed Blue       1     34 4 1 1 12 17 104 4 4 21 19
Summer Azure 11 15 3 28 1 10 33 26 29 118 29 48 78 165 177 31 5
Silvery Blue   1       3   CW
July 4
15 CW
2       2    
Great Spangled Fritillary 7 8 6 7 11 2 26 43 81 120 94 84 127 53 74 24 13
Aphrodite Fritillary 2 2 2 3 4 2 2 3 1 11 14 108 103 15 16 129 5
Atlantis Fritillary 2 3 2 3 9 4 5 4   46 4 18 13 1 11 1  
Silver-bordered Fritillary           1 1 1 6 1 2 5 2 2 4 6  
Meadow Fritillary   4 2 11 3 12 37 46 25 74 79 19 160 72 143 60 17
Silvery Checkerspot               3 3   1 1          
Pearl Crescent 3 7 5 4 CW
July 14
4 14 4 19 79 24 223 116 5 41 8 1
Northern Crescent 26 59 14 85 107 435 118 193 214 88 244 46 48 60 36 12 11
Tawny Crescent         1     1     3 1        
Baltimore Checkerspot 2 10   CW
July 7
    2 3 64 2 6 1 20 26 9 1 10
Question Mark 2   1 6       6   1 2 5 2 4 2    
Eastern Comma 3 3 1 3   1 4 11 15 4 3 1 3 17 17 4 1
Satyr Comma                 2                
Green Comma 1 2 1 8 1 3 1     2 1   2   2    
Grey Comma 2 4 4 1 1 2 3 6 9 1 5 1 5 4 24 1  
Compton Tortoiseshell   2   4 1   2 8   2              
Mourning Cloak 6 1 4 5     1 16 5 4 4 4 18 2 10 4  
Milbert's Tortoiseshell       3       1 4 1              
American Lady     1 2           6 1 12 2 2 3 1 3
Painted Lady                   CW
  2     1   1
Red Admiral 2   2 38   2 41 4 1 67   11   7 9 3 11
White Admiral 3 9 8 9 10 14 6 40 37 19 34 10 9 64 20 21 5
Viceroy     2 3 2 15 3 8 19 7 47 16 23 32 20 6 3
Northern Pearly-Eye 2 4 7 23 3 8 81 39 53 22 20 36 19 26 63 11 23
Eyed Brown 2 27 1 75 44 22 50 76 168 114 67 78 105 113 255 29 26
Appalachian Brown 1 1 1 5 3 6 10 7 18 11 4 16 14 17 24 18 22
Little Wood-Satyr   6 2 1 1 8 29 22 30 10 34 9 21 25 23 1 7
Common Ringlet   1   4 2 8 5 26 77 3 90   7 52 31 7 7
Common Wood-Nymph 7   15 3 5   11 1   10 1 86 89 3 10 1  
Monarch   1 4 11 1 6 113 39 10 28 11 80   7 3   14
Silver-spotted Skipper       CW
July 7
      3     1   1 2 1   2
Northern Cloudywing 3 13 1 2 3 8 14 10 14 6 18 5 1 3 10 9 1
Dreamy Duskywing             1   1             1  
Columbine Duskywing 15   15 6 2   10   2 16 3 159 5   3 4  
Least Skipper   2     1 2 1 14 15 8 24 23 9 16 15 1 13
European Skipper 4 260 21 255 277 425 569 1985 2236 666 1876 10 130 686 868 153 315
Indian Skipper   4   1   4   2 5 3 2       3   1
Peck's Skipper 3 7   7 1 5 10 13 11 43 32 40 52 16 75 36 14
Tawny-edged Skipper 2 12 2 12 5 8 6 28 36 18 11 15 16 30 21 3 3
Crossline Skipper   1 1 2 1 1 3 1 9 7 7 17 35 11 8 2 3
Long Dash Skipper   3 2 9 8 9 13 51 95 38 72 8 7 28 65 40 25
Northern Broken-Dash 3   1 8 CW
July 14
1 11 2 1 5 19 32 17 5 15 9 1
Little Glassywing                             1 5  
Delaware Skipper             6 2   2 4 99 42 29 8 7 4
Mulberry Wing                           1      
Hobomok Skipper 1 3   2 4 2 5 7 14 1 28   6 4 8 2 2
Broad-winged Skipper   12 3 5 11 26 12 1 11 5 3 24 6 2 2   1
Dion Skipper       1     1 1   4 2 27 20 5 2   1
Two-spotted Skipper                     CW
July 1
    2      
Dun Skipper 12 2 22 52 18 10 47 10 9 81 28 286 60 34 45 4 12
Common Roadside Skipper   1   2   1   3     1       1    
Pieris sp.                 25 14 1 3 3 7   3  
Colias sp.                   1   6 3        
Satyrium sp.       1         1 4 3   3 6 1    
Blue sp.                 3       1        
Speyeria sp. 10 15 18 21 10 15 16 106 29 55 25 66 254 31 100 49 12
Boloria sp.               2 2       1 1 10    
Polygonia sp. 1 4 3 4     3   1 2 2 1 5 6 15 4  
Phyciodes sp. 2 3         4 29 89 2 10 66 166   35 31 1
Satyrodes sp.       2                     2   1
Lethe sp.                     1   1     55  
Hesperia sp.                     5   17   5   1
Total individuals 160 542 221 830 578 1102 1529 3181 3788 2101 3193 2125 2885 2605 2688 977 661
Total species 32 42 35 47 32 39 50 55 47 55 55 51 51 53 58 48 43
 
No. participants 4 5 4 3 4 2 28 23 29 32 28 23 29 30 37 16 26
No. parties 1 1 1 1 1 1 7 8-12 9-11 8-14 7-11 7 6-16 5-21 6-23 2-16 4
Hours on foot 5.5 5.5 5.5 7 6 6 33 46 47.5 46 41.75 32.5 42.5 31 38 11.2 25.5
Hours by car 0.5 0.5 0.5 1 0.5 0.5 7.5 8 3.3 3.25 5.5 1.5 3 3.5 2.8 0.9 2
Miles on foot 4 3 5 6 5 5 28 36.56 36 40 42.8 25 28 25 36.2 4.9 21.2
Miles by car 21 17 25 39 20 25 137.5 194.38 104 107.7 149.4 56.2 52 111 82.2 20.9 58.1
Date of count 23 July 26 June 23 July 8 July 13 July 6 July 7 July 5 July 5 July 3 July 2 July 8 July 13 July 5 July 4 July 3 July 8 July
Start time 1000 1000 1000   1000 0930 0845 0845 0900 0900 0900 0830 0900 0900 0900 0900 0915
Finish time 1600 1600 1600   1630 1600 1630 1630 1700 1630 1700 1730 1630 1700 1645 1515 1715
Low temperature 18 22 18   24 25 19 19 17 21 21 19 20 18 19 21 19
High temperature 24 31 22   30 31 20 29 24 30 28 25 30 27 24 27 21
Total party hours 6 6 6 8 6.5 6.5 40.5 54 50.8 49.25 47.25 34 45 34.5 40.8 12.1 27.5
Total party miles 25 20 30 45 25 30 165.5 230.94 140 147.7 192.2 81.2 80 136 118.4 25.8 79.3

This page was revised on 6 July 2016
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