(In the photo above, a Prong-gilled mayfly, genus Paraleptophlebia found in Montana. Note the "tusks" that occur on western species of this genus.)
Photos of the small minnow mayflies (Baetidae), flatheaded mayflies (Heptageniidae), and spiny crawler mayflies (Ephemerellidae), by species, that I have found in our streams to date, were posted on 9/25, 9/28, and 9/29 respectively. These are photos of the other mayfly families. Most ID's have been left at the level of genus.
Ameletus lineatus. Size: not given by Beaty; Season: Winter into Spring.
2. Isonychiidae (Brush-legged mayflies)
Isonychia. Size: not given by Beaty; Season: Spring, Summer, Fall -- most mature in Summer.
3. Leptohyphidae (Little stout crawlers)
Trichorythodes. Size: 3-4 mm; Season: Summer
4. Caenidae (Small square-gill mayflies)
Caenis. Size: not given by Beaty; Season: Summer.
Do not yet have a photo of a live nymph. For a microscope photo of a preserved specimen, see the entry posted on 1/28/11.
5. Baetiscidae (Armored mayflies)
Baetisca. Size: 6-10 mm; Season: Fall and Winter.
Do not yet have a photo of a live nymph. For a microscope photo of a preserved specimen, see the entry posted on 1/22/11.
6. Leptophlebiidae (Prong-gilled mayflies)
Paraleptophlebia sp. (mollis?)
Paraleptophlebia sp. (adoptiva?)
Habrophlebia vibrans. Size: not given by Beaty; Season: Fall, Winter, Spring.
Leptophlebia. Size varies by species. Season: Fall and Winter.
7. Ephemeridae (Common burrower mayflies)
Ephemera guttalata. Size: up to 20 mm; Season: Spring.