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
August 23, 2014 ddrudis Juneau Borough, Alaska, United States September 21, 2014 Details
September 17, 2014 juliereid Ontario, Canada September 17, 2014 Details
September 01, 2014 LibbyMegna Teton County, Wyoming, United States September 10, 2014 Details
August 22, 2014 Eelhsa Ontario, Canada September 10, 2014 Details
July 31, 2014 BeaLaporte Ontario, Canada August 22, 2014 Details
July 31, 2014 BeaLaporte Ontario, Canada August 22, 2014 Details
August 02, 2014 Sue Orlowski Spokane County, Washington, United States August 10, 2014 Details
July 23, 2014 BioHazard54 Wisconsin, United States August 06, 2014 Details
August 05, 2014 vgibbons Newfoundland and Labrador, Canada August 06, 2014 Details
July 30, 2014 juliereid Ontario, Canada July 30, 2014 Details
July 26, 2014 curtis.lehman (Steve Gosser) Lawrence County, Pennsylvania, United States July 27, 2014 Details
July 20, 2014 allelopath Los Alamos County, New Mexico, United States July 24, 2014 Details
July 14, 2014 erikamit Washington County, Vermont, United States July 21, 2014 Details
July 13, 2014 billrey Pennington County, Minnesota, United States July 17, 2014 Details
July 08, 2014 JDreimiller Pierce County, Washington, United States July 14, 2014 Details
June 21, 2014 LibbyMegna Albany County, Wyoming, United States July 01, 2014 Details
June 26, 2014 sseagrave Sheridan County, Wyoming, United States June 27, 2014 Details
June 21, 2014 Sue Orlowski Spokane County, Washington, United States June 25, 2014 Details
June 13, 2014 Paul Tavares Ontario, Canada June 17, 2014 Details
May 13, 2014 Sue Orlowski Douglas County, Washington, United States May 19, 2014 Details
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