Attributes of Aglais milberti
Milbert's Tortoiseshell
Aglais milberti (Godart, 1819)
Family: Nymphalidae
Subfamily: Nymphalinae
Identification: Forewing tip squared-off. Upperside is black with a wide orange submarginal band which grades to yellow at the inner edge of band. Narrow black marginal border on both wings; the hindwing border may contain some blue spots.
Wing Span: 1 5/8 - 2 1/2 inches (4.2 - 6.3 cm).
Life History: In the afternoon, males perch on hillsides, banks of gulches, logs, or behind bushes to watch for females. Eggs are laid in large batches of up to 900 on the underside of host plant leaves. Young caterpillars feed together in a web, while older ones feed alone and make shelters of folded leaves tied with silk. Adults hibernate, sometimes in small groups.
Flight: Two broods from May-October.
Caterpillar Hosts: Nettles (Urtica dioica and U. procera).
Adult Food: Usually flowers, such as thistles, goldenrods, and lilacs; probably also sap and rotting fruit.
Habitat: Wet areas near woodlands, moist pastures, marshes.
Range: Boreal North America south of the taiga. Southern Alaska south to California, Nevada, and New Mexico; east to Newfoundland and West Virginia.
Conservation: Not required.
NCGR:
Management Needs: None reported.
Taxonomy Notes:
Images of Aglais milberti
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The map below displays all verified sighting records in the BAMONA database for this species. Each record is indicated with a yellow dot. The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. In some instances, there are several records at the same location. Use the table view to access these records.
Instructions: Click on the map and move your mouse to pan.
Zoom by using the plus [+] and minus [-] on the left side of the map.
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The fifty most recently verified sightings are below. See more recently verified sightings of all species.
| Observation Date | Submitter | Region |
Verified Date |
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May 19, 2013 | Eve Forward | Island County, Washington, United States | May 20, 2013 | Details |
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May 08, 2013 | redpark | Whatcom County, Washington, United States | May 09, 2013 | Details |
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May 07, 2013 | PDunwiddie | Island County, Washington, United States | May 07, 2013 | Details |
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June 17, 2012 | dpgbfly1 | Mille Lacs County, Minnesota, United States | January 08, 2013 | Details |
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June 24, 2011 | dpgbfly1 | Isanti County, Minnesota, United States | January 06, 2013 | Details |
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July 07, 2012 | LJodwalis | Fairbanks North Star Borough, Alaska, United States | January 05, 2013 | Details |
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July 05, 2008 | dpgbfly1 | Aitkin County, Minnesota, United States | January 01, 2013 | Details |
| July 18, 1993 | legacy.reporter (Arthur Shapiro) | Washoe County, Nevada, United States | December 01, 2012 | Details | |
| May 17, 1997 | legacy.reporter (J. Emmel & G. Pratt) | Nye County, Nevada, United States | December 01, 2012 | Details | |
| April 19, 1996 | legacy.reporter (Ray Stanford) | Navajo County, Arizona, United States | December 01, 2012 | Details | |
| May 01, 2001 | legacy.reporter (Ray Stanford) | Navajo County, Arizona, United States | December 01, 2012 | Details | |
| November 15, 2002 | legacy.reporter (Ray & Kit Stanford) | Greenlee County, Arizona, United States | December 01, 2012 | Details | |
| April 18, 2003 | legacy.reporter (Ray & Kit Stanford) | Mohave County, Arizona, United States | December 01, 2012 | Details | |
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August 11, 2012 | Kyle Jones | Windsor County, Vermont, United States | October 29, 2012 | Details |
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September 06, 2012 | John Barry | Alberta, Canada | September 15, 2012 | Details |
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August 24, 2012 | schmidts128@hotmail.com | Kenai Peninsula Borough, Alaska, United States | September 05, 2012 | Details |
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September 01, 2012 | PDunwiddie | Pierce County, Washington, United States | September 03, 2012 | Details |
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September 02, 2012 | PDunwiddie | Pierce County, Washington, United States | September 03, 2012 | Details |
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May 31, 2012 | ScottAYoung | Rockingham County, New Hampshire, United States | August 28, 2012 | Details |
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August 26, 2012 | curtis.lehman | Washington County, Pennsylvania, United States | August 26, 2012 | Details |
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August 19, 2012 | PDunwiddie | Whatcom County, Washington, United States | August 25, 2012 | Details |
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June 29, 2012 | nova79 | Manitoba, Canada | July 28, 2012 | Details |
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June 06, 2012 | Niayre | Bernalillo County, New Mexico, United States | July 22, 2012 | Details |
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July 14, 2012 | PDunwiddie | Kittitas County, Washington, United States | July 17, 2012 | Details |
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June 26, 2012 | MamaMac | Alberta, Canada | July 16, 2012 | Details |
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September 30, 2011 | Prairie Wetlands Learning Center | Otter Tail County, Minnesota, United States | July 14, 2012 | Details |
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July 05, 2012 | PDunwiddie | King County, Washington, United States | July 07, 2012 | Details |
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May 30, 2012 | nesvt | Addison County, Vermont, United States | June 25, 2012 | Details |
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June 08, 2012 | carrie.munill | Baker County, Oregon, United States | June 19, 2012 | Details |
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September 10, 2011 | jim8435wisc | Jackson County, Wisconsin, United States | June 18, 2012 | Details |
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June 12, 2012 | klgraves | Apache County, Arizona, United States | June 16, 2012 | Details |
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April 05, 2012 | Glennie | Manitoba, Canada | June 12, 2012 | Details |
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April 02, 2012 | lmdemont | Lewis And Clark County, Montana, United States | June 08, 2012 | Details |
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April 22, 2012 | VirgilA.McConnellJR. | Blaine County, Montana, United States | June 08, 2012 | Details |
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March 12, 2012 | Marv and Sue Elliott | Rutland County, Vermont, United States | May 18, 2012 | Details |
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July 22, 2007 | hjbarkey9 | Routt County, Colorado, United States | May 16, 2012 | Details |
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April 14, 2012 | Rick Henle | Carroll County, New Hampshire, United States | May 13, 2012 | Details |
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January 10, 2012 | mawoods | Houghton County, Michigan, United States | April 10, 2012 | Details |
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April 06, 2012 | mpickens1 | Houghton County, Michigan, United States | April 10, 2012 | Details |
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March 12, 2012 | JohnnMelissa | White Pine County, Nevada, United States | April 01, 2012 | Details |
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August 02, 2011 | Nancy Lea Sandy | Natrona County, Wyoming, United States | March 26, 2012 | Details |
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March 18, 2012 | aarongunnar | Chippewa County, Wisconsin, United States | March 19, 2012 | Details |
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October 02, 2011 | klzolson | Price County, Wisconsin, United States | January 04, 2012 | Details |
| July 05, 1976 | legacy.reporter (R. H. Leuschener) | Washoe County, Nevada, United States | January 01, 2012 | Details | |
| June 26, 2012 | Ken Davenport (Ken Davenport) | Mono County, California, United States | January 01, 2012 | Details | |
| April 19, 1996 | legacy.reporter (Ray Stanford) | Navajo County, Arizona, United States | January 01, 2012 | Details | |
| June 06, 1999 | legacy.reporter (Pam Weatherbee) | Berkshire County, Massachusetts, United States | January 01, 2012 | Details | |
| July 24, 1999 | legacy.reporter (ZNC CENTRAL BERKSHIRE) | Berkshire County, Massachusetts, United States | January 01, 2012 | Details | |
| March 26, 1999 | legacy.reporter (Tom Tyning) | Berkshire County, Massachusetts, United States | January 01, 2012 | Details | |
| April 19, 1999 | legacy.reporter (Gail Howe) | Berkshire County, Massachusetts, United States | January 01, 2012 | Details |
