Focal species:

None Acadian Hairstreak Alfalfa Butterfly American Copper American Lady Aphrodite Fritillary Appalachian Brown Arctic Skipper Atlantis Fritillary Baltimore Checkerspot Banded Hairstreak Black Dash Skipper Black Swallowtail Bog Copper Bog Elfin Bog Fritillary Boreal Spring Azure Broadwinged Skipper Bronze Copper Brown Elfin Cabbage Butterfly Canadian Tiger Swallowtail Checkered White Clayton's Copper Clouded Sulphur Cloudless Sulphur Cobweb Skipper Common Buckeye Common Roadside Skipper Common Sootywing Common Wood-Nymph Compton Tortoiseshell Coral Hairstreak Crossline Skipper Crowberry Blue Delaware Skipper Dreamy Duskywing Dun Skipper Dusted Skipper Early Hairstreak Eastern Comma Eastern Pine Elfin Eastern Tailed Blue Eastern Tiger Swallowtail Edwards' Hairstreak European Skipper Eyed Brown Fiery Skipper Frigga Fritillary Giant Swallowtail Gray Hairstreak Great Spangled Fritillary Green Comma Greenish Blue Grey Comma Harris's Checkerspot Harvester Henry's Elfin Hessel's Hairstreak Hoary Comma Hoary Elfin Hobomok Skipper Indian Skipper Inornate Ringlet Jutta Arctic Juvenal's Duskywing Katahdin Arctic Large Sulphur Large White Laurentian Skipper Least Skipper Leonard's Skipper Little Glassywing Skipper Little Sulphur Little Wood Saytr Long Dash Skipper Long-tailed Skipper Meadow Fritillary Milbert's Tortoiseshell Monarch Mourning Cloak Mulberry Wing Mustard White New England Azure Northern Blue Northern Broken Dash Northern Cloudywing Northern Pearl Crescent Northern Pearly-Eye Olive Hairstreak Painted Lady Pearl Crescent Peck's Skipper Pepper & Salt Skipper Pink-edged Sulphur Pipevine Swallowtail Purple Lesser Fritillary Question Mark Red Admiral Red-spotted Purple Regal Fritillary Satyr Comma Silver-bordered Fritillary Silver-spotted Skipper Silvery Blue Silvery Checkerspot Sleepy Duskywing Snout Butterfly Southern Cloudywing Spicebush Swallowtail Striped Hairstreak Summer Azure Tawny-edged Skipper Two-spotted Skipper Variegated Fritillary Viceroy Western Pine Elfin Western Tailed Blue White Admiral Wild Indigo Duskywing

Optional second species:

None Acadian Hairstreak Alfalfa Butterfly American Copper American Lady Aphrodite Fritillary Appalachian Brown Arctic Skipper Atlantis Fritillary Baltimore Checkerspot Banded Hairstreak Black Dash Skipper Black Swallowtail Bog Copper Bog Elfin Bog Fritillary Boreal Spring Azure Broadwinged Skipper Bronze Copper Brown Elfin Cabbage Butterfly Canadian Tiger Swallowtail Checkered White Clayton's Copper Clouded Sulphur Cloudless Sulphur Cobweb Skipper Common Buckeye Common Roadside Skipper Common Sootywing Common Wood-Nymph Compton Tortoiseshell Coral Hairstreak Crossline Skipper Crowberry Blue Delaware Skipper Dreamy Duskywing Dun Skipper Dusted Skipper Early Hairstreak Eastern Comma Eastern Pine Elfin Eastern Tailed Blue Eastern Tiger Swallowtail Edwards' Hairstreak European Skipper Eyed Brown Fiery Skipper Frigga Fritillary Giant Swallowtail Gray Hairstreak Great Spangled Fritillary Green Comma Greenish Blue Grey Comma Harris's Checkerspot Harvester Henry's Elfin Hessel's Hairstreak Hoary Comma Hoary Elfin Hobomok Skipper Indian Skipper Inornate Ringlet Jutta Arctic Juvenal's Duskywing Katahdin Arctic Large Sulphur Large White Laurentian Skipper Least Skipper Leonard's Skipper Little Glassywing Skipper Little Sulphur Little Wood Saytr Long Dash Skipper Long-tailed Skipper Meadow Fritillary Milbert's Tortoiseshell Monarch Mourning Cloak Mulberry Wing Mustard White New England Azure Northern Blue Northern Broken Dash Northern Cloudywing Northern Pearl Crescent Northern Pearly-Eye Olive Hairstreak Painted Lady Pearl Crescent Peck's Skipper Pepper & Salt Skipper Pink-edged Sulphur Pipevine Swallowtail Purple Lesser Fritillary Question Mark Red Admiral Red-spotted Purple Regal Fritillary Satyr Comma Silver-bordered Fritillary Silver-spotted Skipper Silvery Blue Silvery Checkerspot Sleepy Duskywing Snout Butterfly Southern Cloudywing Spicebush Swallowtail Striped Hairstreak Summer Azure Tawny-edged Skipper Two-spotted Skipper Variegated Fritillary Viceroy Western Pine Elfin Western Tailed Blue White Admiral Wild Indigo Duskywing

Optional third species:

None Acadian Hairstreak Alfalfa Butterfly American Copper American Lady Aphrodite Fritillary Appalachian Brown Arctic Skipper Atlantis Fritillary Baltimore Checkerspot Banded Hairstreak Black Dash Skipper Black Swallowtail Bog Copper Bog Elfin Bog Fritillary Boreal Spring Azure Broadwinged Skipper Bronze Copper Brown Elfin Cabbage Butterfly Canadian Tiger Swallowtail Checkered White Clayton's Copper Clouded Sulphur Cloudless Sulphur Cobweb Skipper Common Buckeye Common Roadside Skipper Common Sootywing Common Wood-Nymph Compton Tortoiseshell Coral Hairstreak Crossline Skipper Crowberry Blue Delaware Skipper Dreamy Duskywing Dun Skipper Dusted Skipper Early Hairstreak Eastern Comma Eastern Pine Elfin Eastern Tailed Blue Eastern Tiger Swallowtail Edwards' Hairstreak European Skipper Eyed Brown Fiery Skipper Frigga Fritillary Giant Swallowtail Gray Hairstreak Great Spangled Fritillary Green Comma Greenish Blue Grey Comma Harris's Checkerspot Harvester Henry's Elfin Hessel's Hairstreak Hoary Comma Hoary Elfin Hobomok Skipper Indian Skipper Inornate Ringlet Jutta Arctic Juvenal's Duskywing Katahdin Arctic Large Sulphur Large White Laurentian Skipper Least Skipper Leonard's Skipper Little Glassywing Skipper Little Sulphur Little Wood Saytr Long Dash Skipper Long-tailed Skipper Meadow Fritillary Milbert's Tortoiseshell Monarch Mourning Cloak Mulberry Wing Mustard White New England Azure Northern Blue Northern Broken Dash Northern Cloudywing Northern Pearl Crescent Northern Pearly-Eye Olive Hairstreak Painted Lady Pearl Crescent Peck's Skipper Pepper & Salt Skipper Pink-edged Sulphur Pipevine Swallowtail Purple Lesser Fritillary Question Mark Red Admiral Red-spotted Purple Regal Fritillary Satyr Comma Silver-bordered Fritillary Silver-spotted Skipper Silvery Blue Silvery Checkerspot Sleepy Duskywing Snout Butterfly Southern Cloudywing Spicebush Swallowtail Striped Hairstreak Summer Azure Tawny-edged Skipper Two-spotted Skipper Variegated Fritillary Viceroy Western Pine Elfin Western Tailed Blue White Admiral Wild Indigo Duskywing

Start year:

1865 1900 1930 1935 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

End year:

2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1995 1990 1985 1980 1975 1970 1965 1960 1955 1950 1945 1940 1935 1930 1900 1865

Binwidth in days:

This tool allows the exploration of the date of occurrence of 34,000+ records in the Maine Butterfly Survey database. Choose a Focal Species of interest from the drop-down menu to the left. You can restrict the search to particular intervals with the Start and End Year drop-down menus. You can set the width of each bin in days from one to ten.

If desired, the histogram for a second and third species can be overlain on the histogram for the Focal Species. Choose species using the Optional second species and Optional third species drop-down menus. The species are coded by transparent colors. A legend to the right gives the color of each species. Darker portions of the histogram indicate the abundance of the less common species. It's easy to get the hang of the technique for two species. Toggle a second species off and on using the None option in the drop-down menu to learn how to interpret the graph. Deciphering three species can be more challenging.

Created and maintained by Herb Wilson (whwilson@colby.edu)