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 1 - 24 of 92 verified sightings
Observation date: Oct 21, 2021
Submitted by: N.C.Schreivogl
Region: Fulton County, New York, United States
Verified by: rosslayberry
Verified date: Oct 22, 2021
Observation date: Jul 24, 2021
Submitted by: kristasessions
Region: Chenango County, New York, United States
Verified by: rosslayberry
Verified date: Jul 25, 2021
Observation date: Jun 08, 2020
Submitted by: rhedden
Region: Rensselaer County, New York, United States
Verified by: rosslayberry
Verified date: Mar 06, 2021
Observation date: Sep 09, 2020
Submitted by: Tom Dudones
Region: Franklin County, New York, United States
Verified by: rosslayberry
Verified date: Oct 19, 2020
Observation date: Aug 22, 2020
Submitted by: Betsy Berglund
Region: Warren County, New York, United States
Verified by: rosslayberry
Verified date: Aug 24, 2020
Observation date: Jul 25, 2020
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Aug 17, 2020
Observation date: Jul 26, 2020
Submitted by: Ed Harrison
Region: Saratoga County, New York, United States
Verified by: rosslayberry
Verified date: Aug 17, 2020
Observation date: Jul 14, 2020
Submitted by: kidoran
Region: Monroe County, New York, United States
Verified by: rosslayberry
Verified date: Jul 17, 2020
Observation date: Jul 02, 2020
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Jul 02, 2020
Observation date: Jun 21, 2020
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Jun 27, 2020
Observation date: Jun 21, 2020
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Jun 27, 2020
Observation date: Jun 21, 2020
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Jun 22, 2020
Observation date: Jul 01, 2006
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Feb 03, 2020
Observation date: Oct 12, 2019
Submitted by: LDonadio74
Region: Rockland County, New York, United States
Verified by: rosslayberry
Verified date: Oct 12, 2019
Observation date: Sep 11, 2019
Submitted by: ellenjones6
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Sep 12, 2019
Observation date: Sep 06, 2019
Submitted by: ellenjones6
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Sep 06, 2019
Observation date: Sep 06, 2019
Submitted by: ellenjones6
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Sep 06, 2019
Observation date: Sep 04, 2019
Submitted by: kristasessions
Region: Cortland County, New York, United States
Verified by: rosslayberry
Verified date: Sep 04, 2019
Observation date: Jul 29, 2019
Submitted by: ellenjones6
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Jul 29, 2019
Observation date: Jul 23, 2019
Submitted by: Sue Gregoire
Region: Schuyler County, New York, United States
Verified by: rosslayberry
Verified date: Jul 24, 2019
Observation date: Jun 18, 2019
Submitted by: BIDEOBOB
Region: Monroe County, New York, United States
Verified by: rosslayberry
Verified date: Jun 26, 2019
Observation date: Jun 25, 2019
Submitted by: BIDEOBOB
Region: Monroe County, New York, United States
Verified by: rosslayberry
Verified date: Jun 25, 2019
Observation date: May 31, 2019
Submitted by: BIDEOBOB
Region: Monroe County, New York, United States
Verified by: rosslayberry
Verified date: Jun 05, 2019
Observation date: Feb 09, 2019
Submitted by: LakeAve216
Region: Tompkins County, New York, United States
Verified by: rosslayberry
Verified date: Feb 11, 2019
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