Rounded Global Status Rank: G1 - Critically Imperiled

Canada

Rounded National Status Rank: N1 - Critically Imperiled

United States

Rounded National Status Rank: N1 - Critically Imperiled

Comments: Adults occur from mid or late May though June, about 45-55 days per year. Eggs hatch in about two wweks . Larvae overwinterin one or more late instars and pupate in late April or May.

2500 - 100,000 individuals

Comments: Crudely estimated at more than 1000 and almost certainly less than 10,000 for Canada. There is no reason to suspect US numbers are more than a few thousand either, but the total could be over 10,000. Thus total population size is low for an insect, especially if there are occasional major fluctuations(e.g. due to severe storms).

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 6 - 20

Comments: The larvae are monophagous on yellow sand verbena Abronia latifolia. Adults take nectar from its flowers.

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

Comments: Beaches, dunes, and sand spits with desnse vigorous patches of sand verbena (Abronia latifolia), but not sandy meadows or nearly bare sand with sparse or non-flowering sand verbena plants only.

Global Range: (1000-5000 square km (about 400-2000 square miles)) Immediate shores Strait of Georgia, British Columbia and Puget Sound, Washington. Range is ecnompasseed within an area of 4850 square km, but the actual range is much smaller.

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round