March 27, Alder Brook feeder of North Branch March 27, Alder Brook feeder of North Branch March 30, New Haven Nash Farm. Contractile colonial ciliate of the Vorticella family, probably Carchesium, growing on mayfly nymph March 30, New Haven Nash Farm. Mayfly with attached micro organisms March 30, New Haven Nash Farm. Closeup of Carchesium on mayfly April 7, North Branch feeder by Lucky 7. Flathead mayfly of the Haptageniidae family April 10, Middlebury River Seeley District, contractile stalked ciliate Carchesium attached to mayfly April 10, Middlebury River Seeley District, Mayfly with attached epibionts April 15, Lewis Creek Parsonage Rd. Flathead mayfly May 15, New Haven River at confluence with Muddy Branch, Mayfly with attached epibionts April 21, Beaver Brook feeder of New Haven below confluence of Baldwin Creek. Flathead mayfly April 21, New Haven Nash Farm May 25, Middle Branch Middlebury River, Ripton May 31, Baldwin Creek upstream of Rt 116. Pronggilled mayfly of the family Leptophlebiidae. Darkfield image June 5, Middlebury River Gorge. Pronggilled mayfly June 28, North Branch Lucky 7. Flathead mayfly Sept 15, Baldwin Creek at Beaver Brook confluence PlecopteraArachnida