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 25 - 48 of 92 verified sightings
Observation date: Jul 09, 2018
Submitted by: ellenjones6
Region: New York, United States
Verified by: rosslayberry
Verified date: Oct 09, 2018
Observation date: Sep 24, 2018
Submitted by: Trishlaube
Region: Ontario County, New York, United States
Verified by: rosslayberry
Verified date: Oct 09, 2018
Observation date: Sep 24, 2018
Submitted by: BIDEOBOB
Region: Monroe County, New York, United States
Verified by: rosslayberry
Verified date: Oct 08, 2018
Observation date: Aug 29, 2018
Submitted by: Xsarewild
Region: Tompkins County, New York, United States
Verified by: rosslayberry
Verified date: Sep 01, 2018
Observation date: Sep 28, 2017
Submitted by: dallison
Region: Chenango County, New York, United States
Verified by: rosslayberry
Verified date: Nov 20, 2017
Observation date: Aug 13, 2017
Submitted by: crx2aj3
Region: Chenango County, New York, United States
Verified by: rosslayberry
Verified date: Nov 03, 2017
Observation date: Oct 27, 2017
Submitted by: klavierabend
Region: Orange County, New York, United States
Verified by: rosslayberry
Verified date: Oct 27, 2017
Observation date: Oct 20, 2017
Submitted by: reutere
Region: Delaware County, New York, United States
Verified by: reutere
Verified date: Oct 21, 2017
Observation date: Oct 10, 2017
Submitted by: Jim Lowe
Region: Tompkins County, New York, United States
Verified by: rosslayberry
Verified date: Oct 12, 2017
Observation date: Oct 05, 2017
Submitted by: lisald100
Region: Delaware County, New York, United States
Verified by: rosslayberry
Verified date: Oct 06, 2017
Observation date: Sep 19, 2017
Submitted by: cdemers
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Sep 28, 2017
Observation date: Aug 30, 2017
Submitted by: monikawood
Region: Steuben County, New York, United States
Verified by: rosslayberry
Verified date: Aug 31, 2017
Observation date: Aug 30, 2017
Submitted by: monikawood
Region: Steuben County, New York, United States
Verified by: rosslayberry
Verified date: Aug 31, 2017
Observation date: Jun 14, 2017
Submitted by: monikawood
Region: Steuben County, New York, United States
Verified by: rosslayberry
Verified date: Jun 18, 2017
Observation date: Jul 23, 2016
Submitted by: wayne13114
Region: Oswego County, New York, United States
Verified by: wayne13114
Verified date: Dec 30, 2016
Observation date: Sep 27, 2016
Submitted by: monikawood
Region: Steuben County, New York, United States
Verified by: rosslayberry
Verified date: Sep 29, 2016
Observation date: Jun 06, 2016
Submitted by: monikawood
Region: Steuben County, New York, United States
Verified by: rosslayberry
Verified date: Jun 06, 2016
Observation date: Jul 20, 2015
Submitted by: JRonan17
Region: Herkimer County, New York, United States
Verified by: rosslayberry
Verified date: Jul 21, 2015
Observation date: Jul 18, 2015
Submitted by: Sue Gregoire
Region: Schuyler County, New York, United States
Verified by: Sue Gregoire
Verified date: Jul 19, 2015
Observation date: Jun 14, 2015
Submitted by: Nadine-BNJ
Region: Hamilton County, New York, United States
Verified by: rosslayberry
Verified date: Jun 15, 2015
Observation date: unknown
Submitted by: legacy.reporter
Region: Hamilton County, New York, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Nassau County, New York, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Oswego County, New York, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Steuben County, New York, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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