March 16, Sucker Brook / Branbury. Didymo filaments March 16, Sucker Brook / Branbury. Individual Didymo cell. March 16, Sucker Brook, Didymo growth on rock April 10, Middlebury River E Middlebury / Grist Mill bridge May 31, Baldwin Creek upstream of Rt 116. Didymo cells attached to filaments. Oct 30 , Baldwin Creek upstream of Rt 116. Didymo completely absent where if was abundant earlier in the season. ColeopteraWorms