Butterflies of Fermilab--Data
A summary of the butterfly data for the 6800 acre Fermilab site, 40 miles west of Chicago, Illinois 
Includes years 1999-2003 observations and photographs of most of the species
Species list1
(53 species) 
Click on the species name for photos2
2003
peak
count3
2003
peak
date3
2002
peak
count
2002
peak
date
2001
peak
count
2001
peak
date
2000 
peak 
count
2000
peak 
date
1999 
peak 
count
1999
peak 
date
Swallowtails 
(family Papilionidae)
                   
Pipevine Swallowtail (Battus philenor)                 1 6/6/99
Black Swallowtail (Papilio polyxenes) 3 6/25/03 2 7/20/02 12 8/4/01 2 8/30/00 2 8/17/99
Giant Swallowtail (Papilio cresphontes) 3 8/14/03 3 8/25/02 1 8/26/01 1 7/25/00 1 8/20/99
Eastern Tiger Swallowtail (Papilio glaucus) 3 8/10/03 3 7/31/02 4 7/31/01 1 6/6/00 1 8/10/99
                     
Whites and Sulphurs
(family Pieridae) 
                   
Checkered White (Pontia protodice)         1 9/5/01        
Cabbage White (Pieris rapae) 12 9/6/03 20+ 8/25/02 30+ 8/4/01 20+ 8/11/00 30 6/21/99
Clouded Sulphur (Colias philodice) 10 10/11/03 30+ 8/25/02
9/24/02
11 8/26/01 
9/11/01
20+ 9/27/00 19 7/6/99
Orange Sulphur (Colias eurytheme)     data combined with Clouded Sulphur data    
Little Yellow (Eurema lisa)     1 6/21/02         1 6/8/99, 7/6/99
Dainty Sulphur (Nathalis iole)         1 8/24/01     1 9/15/99
                     
Gossamer-wing Butterflies
(family Lycaenidae) 
                   
Bronze Copper (Lycaena hyllus) 3 7/29/03 1 9/11/02 5 8/3/01 3 8/7/00 3 6/8/99, 8/16/99
Purplish Copper (Lycaena helloides) 14 9/9/03 3 8/27/02 5 9/11/01 9 9/1/00 2 9/7/99
Coral Hairstreak (Satyrium titus) 7 7/13/03 3 6/21/02 7 6/30/01 5 7/3/00    
Acadian Hairstreak (Satyrium acadica) 1 7/9/03 1 7/3/02 1 7/8/01     1 6/23/99
Banded Hairstreak (Satyrium calanus) 4 7/14/03 1 7/14/02 5 6/25/01 2 6/22/00 5 6/21/99
Eastern Tailed-Blue (Everes comyntas) 5 7/29/03 20 8/25/02 15 8/24/01 11 8/11/00 15 8/10/99
Spring Azure (Celastrina ladon) 2 7/24/03 2 7/12/02 3 8/10/01 5 8/6/00 3 8/10/99
                     
Brushfooted Butterflies
(family Nymphalidae)
                   
American Snout (Libytheana carinenta)         1 9/29/01 1 7/21/00    
Variegated Fritillary (Euptoieta claudia)         2 8/26/01        
Great Spangled Fritillary (Speyeria cybele) 10 7/14/03 4 7/3/02 11 7/5/01 5 6/22/00 8 6/21/99
Meadow Fritillary (Boloria bellona) 20+ 7/31/03 15 6/28/02 5 6/24/01 
9/2/01
       
Pearl Crescent (Phyciodes tharos) 20 5/13/03 20 8/25/02 19 8/24/01 8 7/11/00 6 7/22/99
Question Mark (Polygonia interrogationis) 1 6/2/03 2 9/8/02 9 5/29/01 4 6/30/00 4 7/6/99
Eastern Comma (Polygonia comma) 7 4/15/03 2 7/14/02 2 9/20/01 4 8/1/00    
Gray Comma (Polygonia progne) 1 7/7/03 2 7/14/02 2 8/4/01        
Mourning Cloak (Nymphalis antiopa) 3 4/15/03 5 4/15/02 2 5/29/01 1 6/7/00 2 9/25/99
American Lady (Vanessa virginiensis) 1 4/25/03 2 5/3/02 5 5/17/01 1 6/7/00    
Painted Lady (Vanessa cardui) 20+ 9/17/03 1 10/6/01 10 8/26/01 1 8/6/00 1 6/6/99
Red Admiral (Vanessa atalanta) 2 7/29/03 1 6/21/02 20+ 5/17/01 3 6/6/00 5+ 9/10/99
Common Buckeye (Junonia coenia)     2 9/30/02 7 9/11/01 4 8/6/00 7 7/6/99
Red-spotted Purple (Limenitis arthemis astyanax)     5 7/31/02 4 8/10/01 1 7/24/00 2 8/10/99
Viceroy (Limenitis archippus) 3 7/29/03 5 7/20/02 18 8/4/01 10 8/24/00 6 6/22/99
Satyrs (subfamily Satyrinae)                     
Northern Pearly-eye (Enodia anthedon) 4 7/14/03 15 7/20/02 1 7/8/01 4 8/1/00    
Eyed Brown (Satyrodes eurydice) 5 7/13/03     1 7/8/01 4 6/29/00 3 7/6/99
Little Wood-Satyr (Megisto cymela) 10 6/24/03     2 6/12/01 1 6/6/00    
Common Wood-Nymph (Cercyonis pegala) 20+ 7/29/03 12 7/20/02 25 7/8/01 13 7/13/00 8 7/6/99
Milkweed butterflies 
(subfamily Danainae)
                   
Monarch (Danaus plexippus) 5 9/6/03 3 10/10 10+ 9/11/01 10+ 9/28/00 10+ 9/10/99
                     
Skippers (family Hesperiidae)                    
Silver-spotted Skipper (Epargyreus clarus) 5 8/13/03 5 7/31/02 7 8/26/01 4 6/6/00    
Wild Indigo Duskywing (Erynnis baptisiae) 3 10/13/03 3 8/28/02 5 9/20/01 10+ 9/9/00 1 9/3/99
Common Checkered-Skipper (Pyrgus communis)             1 7/11/00    
Common Sootywing (Pholisora catullus) 1 6/7/03     1 8/26/01        
Least Skipper (Ancyloxypha numitor) 3 6/24/03 5 6/21/02 20+ 8/4/01 20+ 8/21/00 2 6/8/99
European Skipper (Thymelicus lineola) 10 6/24/03 11 6/21/02 20+ 6/21/01 6 7/3/00 12 6/21/99
Fiery Skipper (Hylephila phyleus)     2 9/7/02 1 8/26/01 2 9/10/00 10 8/16/99
Peck's Skipper (Polites peckius) 2 6/20/03 3 6/7/02 4 6/12/01 6 6/7/00 1 9/30/99
Tawny-edged Skipper (Polites themistocles) 10 6/7/03     2 5/29/01 4 6/7/00 4 6/6/99
Northern Broken-Dash (Wallengrenia egeremet)     4 7/14/02            
Little Glassywing (Pompeius verna)         1 6/22/01        
Sachem (Atalopedes campestris)             1 9/10/00    
Delaware Skipper (Anatrytone logan) 1 7/9/03 3 7/20/02 2 7/11/01 2 7/7/00    
Dion Skipper (Euphyes dion) 3 7/9/03 20 7/16/02 12 7/5/01        
Black Dash (Euphyes conspicua) 1 7/16/03 2 7/12/02 2 7/13/01 2 7/7/00 2 7/6/99
Dun Skipper (Euphyes vestris)         3 7/13/01 3 8/1/00 1 6/21/99

Footnotes and more information:


For more information contact Tom Peterson (tommy@fnal.gov), 630 840 4458.