Cyanobacteria

Tolyphothrix

South Fork McKenzie River Below Cougar Reservoir, Oregon

Nostoc

McKenzie River At Hayden Bridge, Oregon

Cylindrospermum

McKenzie River At Hayden Bridge, Oregon

Cylindrospermum

McKenzie River At Hayden Bridge, Oregon

Dolichospermum

South Fork McKenzie River Below Cougar Reservoir, Oregon

Nostoc

Blue River Reservoir Near East End, Oregon

Gloeotrichia

Blue River Reservoir Near East End, Oregon

Dolichospermum

Middle Fork Willamette Side Pond, Oregon, 2017

Microcystis

Spanaway Lake, WA

Microcystis

Spanaway Lake, WA

Aphanizomenon

Anderson Lake, WA

Aphanizomenon

Anderson Lake, WA