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 145 - 168 of 2756 verified sightings
Observation date: Jul 06, 2018
Submitted by: J Rachwalski
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 23, 2022
Observation date: Apr 10, 2019
Submitted by: Asimonen
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 23, 2022
Observation date: Jun 22, 2019
Submitted by: Liz Osborn
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 16, 2022
Observation date: Jun 21, 2019
Submitted by: Liz Osborn
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 16, 2022
Observation date: Jul 01, 2019
Submitted by: Claire Christensen
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 14, 2022
Observation date: Jun 14, 2019
Submitted by: Reiner Jakubowski
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 13, 2022
Observation date: Apr 13, 2020
Submitted by: Joyce Kozdrowski
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 10, 2022
Observation date: Apr 15, 2021
Submitted by: M Burgerjon
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 10, 2022
Observation date: Sep 03, 2022
Submitted by: Aprilmoonlight
Region: Grafton County, New Hampshire, United States
Verified by: John Calhoun
Verified date: Sep 07, 2022
Observation date: Aug 21, 2022
Submitted by: Gtosher
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 07, 2022
Observation date: Aug 17, 2022
Submitted by: jvkopple2
Region: Kalkaska County, Michigan, United States
Verified by: elsner
Verified date: Sep 01, 2022
Observation date: Aug 23, 2022
Submitted by: Geoff Urwin
Region: Saskatchewan, Canada
Verified by: alchem30
Verified date: Aug 24, 2022
Observation date: Aug 17, 2022
Submitted by: ILKA MILNE
Region: Ontario, Canada
Verified by: jmgesell
Verified date: Aug 17, 2022
Observation date: Aug 14, 2022
Submitted by: Chris Carvalho
Region: Hood River County, Oregon, United States
Verified by: Ken Davenport
Verified date: Aug 15, 2022
Observation date: Jul 25, 2021
Submitted by: John Gibbons
Region: Newfoundland and Labrador, Canada
Verified by: jmgesell
Verified date: Aug 08, 2022
Observation date: Jul 02, 2022
Submitted by: bonfrey
Region: Otero County, New Mexico, United States
Verified by: stevecary
Verified date: Aug 04, 2022
Observation date: May 27, 2022
Submitted by: hasfitz5
Region: White Pine County, Nevada, United States
Verified by: Ken Davenport
Verified date: Jul 27, 2022
Observation date: Jul 09, 2022
Submitted by: NikkiM
Region: Carbon County, Montana, United States
Verified by: J_Martineau
Verified date: Jul 25, 2022
Observation date: Jul 18, 2022
Submitted by: JudyLY
Region: Otero County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 22, 2022
Observation date: Jul 08, 2022
Submitted by: twofried
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 12, 2022
Observation date: Jul 09, 2022
Submitted by: Pheasantboy77
Region: Gallatin County, Montana, United States
Verified by: J_Martineau
Verified date: Jul 11, 2022
Observation date: Jul 04, 2022
Submitted by: Joshua C
Region: Bernalillo County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 05, 2022
Observation date: Jun 28, 2022
Submitted by: mashoop58
Region: Bernalillo County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 05, 2022
Observation date: Jun 19, 2022
Submitted by: JudyLY
Region: Otero County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 01, 2022
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