The mangrove biting midge, Culicoides ornatus can be an appreciable pest close to its breeding sites. In the NT, C. ornatus causes the greatest problems around extensive coastal and tidal river mangrove areas up to 2km inland from the mangrove margin. This calendar shows periods when high C. ornatus numbers are expected in NT coastal areas in 2022. Biting midge numbers vary greatly depending on the location, and may be present at or very near the mangrove margin at any time.