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.
Alternate Scientific Names:
Nymphalis milberti
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Verified Sightings
Displaying 121 - 144 of 2767 verified sightings
Observation date: Apr 01, 2023
Submitted by: DeepSkyKelly
Region: Colfax County, New Mexico, United States
Verified by: stevecary
Verified date: Apr 02, 2023
Observation date: Mar 20, 2023
Submitted by: Flutterby2023
Region: Ontario, Canada
Verified by: curtis.lehman
Verified date: Mar 22, 2023
Observation date: Aug 12, 2022
Submitted by: NikkiM
Region: Park County, Wyoming, United States
Verified by: J_Martineau
Verified date: Mar 14, 2023
Observation date: Sep 03, 2022
Submitted by: NikkiM
Region: Carbon County, Montana, United States
Verified by: J_Martineau
Verified date: Feb 27, 2023
Observation date: Aug 03, 2020
Submitted by: Todd Boland
Region: Newfoundland and Labrador, Canada
Verified by: jmgesell
Verified date: Feb 12, 2023
Observation date: Aug 14, 2020
Submitted by: Todd Boland
Region: Newfoundland and Labrador, Canada
Verified by: jmgesell
Verified date: Feb 11, 2023
Observation date: Jul 26, 2020
Submitted by: Todd Boland
Region: Newfoundland and Labrador, Canada
Verified by: jmgesell
Verified date: Feb 11, 2023
Observation date: Aug 11, 2021
Submitted by: Todd Boland
Region: Newfoundland and Labrador, Canada
Verified by: jmgesell
Verified date: Feb 10, 2023
Observation date: Jun 21, 2019
Submitted by: frogbandit
Region: Matanuska-Susitna, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: May 02, 2020
Submitted by: odonatak@gmail.com
Region: Juneau, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Sep 27, 2022
Submitted by: flowerfarm
Region: Alberta, Canada
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Sep 15, 2022
Submitted by: Cindy Boisvert
Region: Alberta, Canada
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Jun 01, 2022
Submitted by: dlister
Region: Anchorage, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Sep 23, 2021
Submitted by: Aleniel
Region: Alberta, Canada
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Jul 11, 2021
Submitted by: frogbandit
Region: Anchorage, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Apr 17, 2021
Submitted by: frogbandit
Region: Anchorage, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Apr 21, 2021
Submitted by: CheddahCurt
Region: Alberta, Canada
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Jul 18, 2020
Submitted by: jsaunders260
Region: Matanuska-Susitna, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: May 02, 2020
Submitted by: odonatak@gmail.com
Region: Juneau, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Jul 18, 2020
Submitted by: Arctic Jim
Region: Matanuska-Susitna, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Jun 23, 2020
Submitted by: Arctic Jim
Region: Matanuska-Susitna, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Apr 25, 2020
Submitted by: bmcgurgan
Region: Anchorage, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Apr 26, 2020
Submitted by: Robert Gibson
Region: Matanuska-Susitna, Alaska, United States
Verified by: curtis.lehman
Verified date: Feb 07, 2023
Observation date: Nov 26, 2018
Submitted by: RStankiewicz
Region: Alberta, Canada
Verified by: curtis.lehman
Verified date: Feb 07, 2023
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