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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Aglais milberti - aglais-milberti-corey-husic-cropped.jpg

Aglais milberti - aglais-milberti-corey-husic-cropped.jpg

The map below displays all BAMONA data for this species and has three different data layers:
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There are also three base layers: 1. Satellite    2. Normal   3. Hybrid

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*The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. Sometimes, there are several records at the same location. Use the table view to access these records.

By default, the fifty most recently verified sightings are below. Sort by Observation Date to see the most recent sightings, or filter the sightings by region to get a regional list.

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Observation Date Submitter Region Verified Datesort icon
April 12, 2014 kdg54ca7775 British Columbia, Canada April 13, 2014 Details
February 18, 2014 Dneugebauer Ontario, Canada March 14, 2014 Details
August 29, 2009 ddodd El Paso County, Colorado, United States February 11, 2014 Details
August 28, 2013 Roger Iverson Pitkin County, Colorado, United States February 10, 2014 Details
August 31, 2013 davidanton Mineral County, Colorado, United States February 10, 2014 Details
December 21, 2013 Sherry Wood Sanilac County, Michigan, United States December 31, 2013 Details
July 03, 2013 Ralph S. Carlson Clackamas County, Oregon, United States October 09, 2013 Details
June 27, 2013 wsensei Harney County, Oregon, United States October 09, 2013 Details
September 09, 2013 Linda Fink Yamhill County, Oregon, United States October 09, 2013 Details
August 30, 2011 BarryN Baker County, Oregon, United States October 08, 2013 Details
September 13, 2013 swittwa Pierce County, Washington, United States September 29, 2013 Details
August 26, 2013 jamesheintz1 Skagit County, Washington, United States September 16, 2013 Details
September 07, 2013 ddrudis Juneau Borough, Alaska, United States September 16, 2013 Details
August 05, 2013 jamesheintz1 Chelan County, Washington, United States September 14, 2013 Details
August 12, 2013 jamesheintz1 Pierce County, Washington, United States September 14, 2013 Details
August 21, 2013 jamesheintz1 Skagit County, Washington, United States September 14, 2013 Details
September 06, 2013 juliereid Ontario, Canada September 08, 2013 Details
August 20, 2013 Zeus79 Macomb County, Michigan, United States August 27, 2013 Details
August 24, 2013 Dave Kinney Wexford County, Michigan, United States August 27, 2013 Details
June 22, 2013 Eelhsa Ontario, Canada August 25, 2013 Details
August 03, 2013 snowcat Skagit County, Washington, United States August 21, 2013 Details
August 14, 2013 klgraves Apache County, Arizona, United States August 18, 2013 Details
August 05, 2013 jamesheintz1 Chelan County, Washington, United States August 11, 2013 Details
July 14, 2013 jamesheintz1 Skagit County, Washington, United States August 10, 2013 Details
July 17, 2013 jamesheintz1 Skagit County, Washington, United States August 10, 2013 Details
May 19, 2013 randimal Grant County, Washington, United States August 02, 2013 Details
July 14, 2013 LoveRawr907 Kenai Peninsula Borough, Alaska, United States July 20, 2013 Details
June 09, 2013 HHowell Teton County, Wyoming, United States July 10, 2013 Details
July 05, 2013 agardener Skagit County, Washington, United States July 05, 2013 Details
April 13, 2013 jenniepie Alberta, Canada June 07, 2013 Details
May 19, 2013 Eve Forward Island County, Washington, United States May 20, 2013 Details
May 08, 2013 redpark Whatcom County, Washington, United States May 09, 2013 Details
May 07, 2013 PDunwiddie Island County, Washington, United States May 07, 2013 Details
June 17, 2012 dpgbfly1 Mille Lacs County, Minnesota, United States January 08, 2013 Details
June 24, 2011 dpgbfly1 Isanti County, Minnesota, United States January 06, 2013 Details
July 07, 2012 LJodwalis Fairbanks North Star Borough, Alaska, United States January 05, 2013 Details
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
August 11, 2012 Kyle Jones Windsor County, Vermont, United States October 29, 2012 Details
September 06, 2012 John Barry Alberta, Canada September 15, 2012 Details
August 24, 2012 schmidts128@hotmail.com Kenai Peninsula Borough, Alaska, United States September 05, 2012 Details
September 01, 2012 PDunwiddie Pierce County, Washington, United States September 03, 2012 Details
September 02, 2012 PDunwiddie Pierce County, Washington, United States September 03, 2012 Details
May 31, 2012 ScottAYoung Rockingham County, New Hampshire, United States August 28, 2012 Details
August 26, 2012 curtis.lehman Washington County, Pennsylvania, United States August 26, 2012 Details