Becker's White
Pontia beckerii (W.H. Edwards, 1871)
Family: Pieridae
Subfamily: Pierinae
Identification: Upperside of both male and female is white, with black spots near tip of forewing. Inside the forewing cell is a square black bar with a curved white center. The underside of the hindwing of both sexes has wide green edging along the veins, confined by a white median band.
Wing Span: 1 5/8 - 2 inches (4 - 5 cm).
Life History: Males patrol ravines in search of females. Females lay eggs singly on host stems, buds, leaves, flowers, and fruits.
Flight: Several flights from March-October.
Caterpillar Hosts: Plants of mustard (Brassicaceae) family including mustards (Brassica), and hedge mustard (Sisymbrium) species; and bladder-pod (Isomeris arborea) in the caper family (Capparidaceae).
Adult Food: Flower nectar including hedge mustard and alfalfa.
Habitat: Arid brushlands, desert foothills and canyons, fields.
Range: British Columbia and Alberta south to Baja California; east of the Cascades and Sierra Nevada, east and south to western Montana and New Mexico.
Conservation: Not required.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None required.
Comments: NULL
Verified Sightings
Displaying 1 - 24 of 421 verified sightings
Observation date: Mar 18, 2018
Submitted by: ncrosbyrd
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Mar 29, 2018
Observation date: Jul 16, 2017
Submitted by: Robert Gorman
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jul 19, 2017
Observation date: Jul 07, 2017
Submitted by: altairpilot
Region: Grant County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 17, 2017
Observation date: Jul 10, 2017
Submitted by: kayjon50
Region: Kittitas County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 12, 2017
Observation date: Jul 02, 2017
Submitted by: MAKI
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jul 04, 2017
Observation date: May 26, 2017
Submitted by: ezeemonee
Region: Ventura County, California, United States
Verified by: Ken Davenport
Verified date: May 27, 2017
Observation date: Apr 29, 2017
Submitted by: diwalks2@gmail.com
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: May 07, 2017
Observation date: Apr 23, 2017
Submitted by: PDunwiddie
Region: Gilliam County, Oregon, United States
Verified by: Ken Davenport
Verified date: May 04, 2017
Observation date: Apr 22, 2017
Submitted by: PDunwiddie
Region: Klickitat County, Washington, United States
Verified by: davidwdroppers
Verified date: Apr 26, 2017
Observation date: May 29, 2016
Submitted by: randimal
Region: Elmore County, Idaho, United States
Verified by: stevekohler
Verified date: Sep 20, 2016
Observation date: Aug 04, 2016
Submitted by: Sue Orlowski
Region: Whitman County, Washington, United States
Verified by: davidwdroppers
Verified date: Aug 24, 2016
Observation date: Aug 03, 2016
Submitted by: Sue Orlowski
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: Aug 18, 2016
Observation date: Jul 29, 2016
Submitted by: MAKI
Region: Inyo County, California, United States
Verified by: Ken Davenport
Verified date: Aug 03, 2016
Observation date: Jul 12, 2016
Submitted by: Bixia
Region: Alpine County, California, United States
Verified by: Ken Davenport
Verified date: Jul 31, 2016
Observation date: Jun 28, 2016
Submitted by: JDreimiller
Region: Lewis County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 03, 2016
Observation date: Jun 11, 2016
Submitted by: philohela
Region: Pershing County, Nevada, United States
Verified by: Ken Davenport
Verified date: Jun 17, 2016
Observation date: May 27, 2016
Submitted by: ezeemonee
Region: Ventura County, California, United States
Verified by: Ken Davenport
Verified date: May 28, 2016
Observation date: Apr 26, 2016
Submitted by: Sue Orlowski
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: May 14, 2016
Observation date: Apr 29, 2016
Submitted by: Bdog
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: May 05, 2016
Observation date: Sep 12, 2015
Submitted by: Chris Carvalho
Region: Harney County, Oregon, United States
Verified by: Ken Davenport
Verified date: Sep 22, 2015
Observation date: Jun 14, 2015
Submitted by: bobscafe
Region: British Columbia, Canada
Verified by: Norbert Kondla
Verified date: Aug 16, 2015
Observation date: Jul 05, 2015
Submitted by: Sue Orlowski
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 11, 2015
Observation date: Jul 05, 2015
Submitted by: Sue Orlowski
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 11, 2015
Observation date: Jul 05, 2015
Submitted by: Sue Orlowski
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 11, 2015
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