Chironomid hatches occur year round, and are usually the first and last hatches of the fishing season. The most intense chironomid hatches occur in May and June. The Chironomid ranges in length from five to twenty-five millimetres in the larva, pupa, and adult stage.

What time of day do chironomids hatch?

Over the years of fishing chironomids, I have found that the major hatches occur between 10 A.M. and 3 P.M. Remember that chironomids can be hatching in very deep water. It is not uncommon to be anchored in 12 meters of water and successfully fishing pupal patterns.

What time of day do midges hatch?

Midges will hatch during the warmest parts of the day often from 10 – 3 pm and can bring nearly every fish in the river to the surface. This hatch alone can make winter fly fishing worth pursuing.