Attributes of Pachysphinx occidentalis

Big poplar sphinx
Pachysphinx occidentalis (Hy. Edwards, 1875)

Family: Sphingidae
Subfamily: Sphinginae
Identification: Two color forms exist. Upperside of wings is yellow brown in the pale form, dark gray in the dark form. Lines and bands are well-defined. Hindwing has a crimson patch covering varying amounts of the wing, and 2 dark lines which do not form a distinct triangle.
Wing Span: 5 1/8 - 5 7/8 inches (13 - 15 cm).
Life History: Females lay eggs on leaves of the hosts. Fully-grown caterpillars pupate and overwinter in shallow burrows in the ground.
Flight: . Two broods in southern Arizona from May-September, one brood northward from June-August.
Caterpillar Hosts: Cottonwood and poplar (Populus) and willow (Salix).
Adult Food: Adults do not feed.
Habitat: Riparian areas and suburbs.
Range: North Dakota west to eastern Washington; south to Texas, southern California, and Baja California Norte.
Conservation: Not usually required.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Taxonomy Notes:

Images of Pachysphinx occidentalis

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Pachysphinx occidentalis - Pachysphinx_occidentalis_Priestley640.jpg

Pachysphinx occidentalis - Pachysphinx_occidentalis_Priestley640.jpg
Pachysphinx occidentalis - 1710_41.jpg

Pachysphinx occidentalis - 1710_41.jpg

The map below displays all BAMONA data for this species and has three different data layers:
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There are also three base layers: 1. Satellite    2. Normal   3. Hybrid

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*The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. Sometimes, there are several records at the same location. Use the table view to access these records.

By default, the fifty most recently verified sightings are below. Sort by Observation Date to see the most recent sightings, or filter the sightings by region to get a regional list.

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Observation Date Submitter Region Verified Datesort icon
May 19, 2013 willysjeepers Emery County, Utah, United States February 20, 2014 Details
August 23, 2013 Molly Taylor Grand County, Utah, United States February 20, 2014 Details
August 04, 2013 wwalker48 Arapahoe County, Colorado, United States February 09, 2014 Details
July 01, 2013 bnzngr El Paso County, Colorado, United States January 08, 2014 Details
August 05, 2011 Josiah Gilbert San Luis Obispo County, California, United States September 07, 2013 Details
August 26, 2013 amandakill420 Madera County, California, United States September 02, 2013 Details
June 27, 2013 Vebshtar Douglas County, Nevada, United States August 24, 2013 Details
August 17, 2013 aenglish Maricopa County, Arizona, United States August 22, 2013 Details
June 13, 2013 matthewjcampbell Umatilla County, Oregon, United States August 18, 2013 Details
July 22, 2013 Kyle Clark Los Angeles County, California, United States July 31, 2013 Details
July 18, 2012 J_Martineau Natrona County, Wyoming, United States February 09, 2013 Details
July 11, 2010 Josiah Gilbert San Luis Obispo County, California, United States November 09, 2012 Details
September 04, 2010 Josiah Gilbert San Luis Obispo County, California, United States October 30, 2012 Details
July 12, 2012 Seacrowe Denver County, Colorado, United States September 09, 2012 Details
April 25, 2012 marijka Fremont County, Colorado, United States September 07, 2012 Details
June 07, 2012 Gdasch Weld County, Colorado, United States September 07, 2012 Details
July 22, 2012 colawman888 Fremont County, Colorado, United States September 07, 2012 Details
August 05, 2012 BOGwalker St Louis County, Minnesota, United States August 14, 2012 Details
August 08, 2012 Clarkelakecamper Manitoba, Canada August 14, 2012 Details
August 06, 2012 hulfordl Churchill County, Nevada, United States August 06, 2012 Details
August 03, 2012 jaimerenee Bernalillo County, New Mexico, United States August 03, 2012 Details
August 31, 2011 Josiah Gilbert San Luis Obispo County, California, United States July 31, 2012 Details
August 31, 2011 Josiah Gilbert San Luis Obispo County, California, United States July 31, 2012 Details
July 13, 2004 cheins Washburn County, Wisconsin, United States July 28, 2012 Details
March 17, 2003 kangaroo1 Clark County, Nevada, United States July 09, 2012 Details
March 17, 2003 kangaroo1 Clark County, Nevada, United States July 09, 2012 Details
June 08, 2003 kangaroo1 Clark County, Nevada, United States July 09, 2012 Details
June 30, 2012 treesnakes Aitkin County, Minnesota, United States July 06, 2012 Details
July 06, 2012 mkwagener Sherburne County, Minnesota, United States July 06, 2012 Details
July 21, 2011 thinkdanni Santa Fe County, New Mexico, United States July 02, 2012 Details
March 17, 2003 kangaroo1 Clark County, Nevada, United States July 02, 2012 Details
June 23, 2012 justcookiecr Becker County, Minnesota, United States June 26, 2012 Details
June 16, 2012 drosbeck Oneida County, Wisconsin, United States June 21, 2012 Details
June 13, 2012 rjtesarek St Louis County, Minnesota, United States June 18, 2012 Details
June 16, 2012 rawenn Minnesota, United States June 18, 2012 Details
June 28, 2011 ladymagpie Manitoba, Canada June 12, 2012 Details
June 08, 2012 Esjay Burnett County, Wisconsin, United States June 12, 2012 Details
June 06, 2012 Goochamaroo St Louis County, Minnesota, United States June 12, 2012 Details
June 04, 2012 Nick Valeri San Bernardino County, California, United States June 05, 2012 Details
July 15, 2011 sharrow Utah, United States May 28, 2012 Details
August 24, 2010 Josiah Gilbert San Luis Obispo County, California, United States May 08, 2012 Details
September 04, 2010 Josiah Gilbert San Luis Obispo County, California, United States May 08, 2012 Details
August 11, 2011 roadrunner Campbell County, Wyoming, United States April 18, 2012 Details
August 09, 2011 Socpxd Deschutes County, Oregon, United States September 12, 2011 Details
July 18, 2011 rhacodactylus Deschutes County, Oregon, United States September 09, 2011 Details
August 12, 2011 whiteb Umatilla County, Oregon, United States September 09, 2011 Details
September 03, 2011 nadiadeleon23 San Bernardino County, California, United States September 09, 2011 Details
August 20, 2011 sharonlombardi Los Angeles County, California, United States August 31, 2011 Details
July 23, 2011 Fleedar Maricopa County, Arizona, United States August 30, 2011 Details
July 22, 2011 mturn2 Washoe County, Nevada, United States August 17, 2011 Details