Attributes of Megathymus yuccae

Yucca Giant-Skipper
Megathymus yuccae (Boisduval & Leconte, [1837])

Family: Hesperiidae
Subfamily: Megathyminae
Identification: Very large and robust. Forewing is long and pointed. Upperside is black; forewing with a yellow band near the lower outer margin and small white spots near the tip and costa; hindwing with a yellow band on the outer margin. Females may have orange-yellow to yellow spots on the hindwing. Underside of hindwing is gray with white spots on the costa.
Wing Span: 1 7/8 - 3 1/8 inches (4.8 - 7.9 cm).
Life History: Adults are very swift fliers. Males perch in the morning near the host plants to await females. Females glue eggs singly to leaves of small host plants. Young caterpillars feed near the tips of leaves and may web together small leaves to make a nest. Older caterpillars bore into the growing point of the plant and feed on the root, making a silk chimney or tent which projects from the growing point. Fully-grown caterpillars overwinter in their burrows and then pupate there in late winter or early spring. The chrysalids are able to move up and down in their burrows.
Flight: One brood from mid-February to mid-May.
Caterpillar Hosts: Various yuccas including bear grass (Yucca filamentosa), Small's yucca (Y. smalliana), Spanish dagger (Y. gloriosa), (Y. elata), and (Y. arizonica) and Spanish bayonet (Y. aloifolia).
Adult Food: Adults do not feed, but males take moisture at mud.
Habitat: Coastal dunes, open yucca flats, desert canyons, open woodland, grassland, and old fields.
Range: Western population east to Nebraska and east Texas, south to northern Mexico. Southeastern population: Southeast Virginia south to southern peninsular Florida, west to Arkansas and Louisiana.
Conservation: Not usually required.
NCGR: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Taxonomy Notes:

Images of Megathymus yuccae

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Megathymus yuccae - Megathymus_yuccaeTNPolk10May2008StephenWJohnson_01.jpg

Megathymus yuccae - Megathymus_yuccaeTNPolk10May2008StephenWJohnson_01.jpg
Megathymus yuccae - Megathymus_yuccaeTNPolk10May2008StephenWJohnson_02.jpg

Megathymus yuccae - Megathymus_yuccaeTNPolk10May2008StephenWJohnson_02.jpg
Megathymus yuccae - yccgntskppr32507-3768.jpg

Megathymus yuccae - yccgntskppr32507-3768.jpg
Megathymus yuccae - megathymus_yuccae_coloradensis_caterpillar5_raisingbutterflies.jpg

Megathymus yuccae - megathymus_yuccae_coloradensis_caterpillar5_raisingbutterflies.jpg

The map below displays all BAMONA data for this species and has three different data layers:
1. All records (yellow dots)   2. Recently verified records (orange dots)*   3. US county records (purple)

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
June 19, 2011 coreyk Clark County, Nevada, United States May 14, 2014 Details
April 06, 2014 James Lofton Roosevelt County, New Mexico, United States April 09, 2014 Details
April 20, 2013 azukoff Scott County, Kansas, United States June 25, 2013 Details
April 27, 2013 joeschelling Sandoval County, New Mexico, United States April 29, 2013 Details
April 19, 2013 joeschelling Grant County, New Mexico, United States April 24, 2013 Details
April 13, 2013 dspicer Hamilton County, Tennessee, United States April 16, 2013 Details
March 23, 2013 nabaker Texas, Kimble County, United States March 27, 2013 Details
March 10, 2012 vitaly charny (Vitaly Charny) Tuscaloosa County, Alabama, United States December 01, 2012 Details
March 18, 2012 legacy.reporter (Kazuo Inagaki) Bibb County, Alabama, United States December 01, 2012 Details
March 31, 2012 vitaly charny (Vitaly Charny) Bibb County, Alabama, United States December 01, 2012 Details
April 08, 2012 vitaly charny (Vitaly Charny) Tuscaloosa County, Alabama, United States December 01, 2012 Details
March 14, 2004 legacy.reporter (Mark Walker) Maricopa County, Arizona, United States December 01, 2012 Details
April 03, 2012 JKHatfield Texas, Lubbock County, United States November 01, 2012 Details
March 19, 2012 Roy Brown Early County, Georgia, United States September 21, 2012 Details
May 19, 2012 dspicer McMinn County, Tennessee, United States May 21, 2012 Details
May 01, 2012 fbooth7 Bradley County, Tennessee, United States May 04, 2012 Details
April 07, 2012 jjweber Texas, Travis County, United States April 13, 2012 Details
March 15, 1969 legacy.reporter (unknown) Clark County, Nevada, United States January 01, 2012 Details
April 13, 1978 legacy.reporter (C. Lawson) Clark County, Nevada, United States January 01, 2012 Details
April 27, 1978 legacy.reporter (C. Lawson) Clark County, Nevada, United States January 01, 2012 Details
April 16, 1979 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 29, 1979 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
May 06, 1978 legacy.reporter (C. Lawson) Clark County, Nevada, United States January 01, 2012 Details
May 28, 1978 legacy.reporter (C. Lawson) Clark County, Nevada, United States January 01, 2012 Details
April 26, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 28, 1977 legacy.reporter (unknown) Clark County, Nevada, United States January 01, 2012 Details
May 04, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
May 13, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
March 07, 1967 legacy.reporter (Peter Herlan) Clark County, Nevada, United States January 01, 2012 Details
March 29, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
March 29, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 08, 1971 legacy.reporter (R. E. Wells) Clark County, Nevada, United States January 01, 2012 Details
April 08, 1977 legacy.reporter (Richard Bailowitz) Clark County, Nevada, United States January 01, 2012 Details
April 12, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 20, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 17, 1966 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
May 28, 1973 legacy.reporter (J. F. Leser) Clark County, Nevada, United States January 01, 2012 Details
April 20, 1975 legacy.reporter (Jim Brock) Clark County, Nevada, United States January 01, 2012 Details
April 24, 1977 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
March 03, 2007 RaisingButterflies.org Washington County, Utah, United States November 28, 2011 Details
April 23, 2011 vitaly charny (Vitaly Charny) Bibb County, Alabama, United States May 31, 2011 Details
April 11, 2011 jrfleullan Jones County, Georgia, United States May 03, 2011 Details
April 11, 2011 Ken Davenport (Ken Davenport) Kern County, California, United States May 01, 2011 Details
April 19, 2011 dspicer Hamilton County, Tennessee, United States April 20, 2011 Details
April 14, 2011 AJ Trently Fayette County, Tennessee, United States April 16, 2011 Details
April 04, 2011 stevecary (James Lofton) Curry County, New Mexico, United States April 08, 2011 Details
April 25, 2010 stevecary Sierra County, New Mexico, United States January 25, 2011 Details
April 21, 1994 Ken Davenport (Ken Davenport) Mohave County, Arizona, United States January 01, 2011 Details
April 17, 2008 Ken Davenport (Ken Davenport) Mohave County, Arizona, United States January 01, 2011 Details
March 15, 1966 legacy.reporter (Killian Roever) Maricopa County, Arizona, United States January 01, 2011 Details