Rhithrogena flavianula

endemic to a single nation

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

Global Range: (250-20,000 square km (about 100-8000 square miles)) Lack of knowledge of the larval stage of this species may accounts for the very few records of it. There are a few California records from 5 counties and in Washington in 2 counties and possibly a record (unconfirmed) from Colorado).

Comments: Larvae are unknown (P. McCafferty, personal communication, December 2003).

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.

United States

Rounded National Status Rank: N2 - Imperiled

Rounded Global Status Rank: G2 - Imperiled

Reasons: Lack of knowledge of the larval stage of this species may accounts for the very few records of it. There are a few California records from 5 counties and in Washington in 2 counties and possibly a record (unconfirmed) from Colorado).