Mostly Midges Right Now
While the occasional blue wing will show up in the afternoon, Midges are definitely the main diet right now. Midges can come off in a variety of colors. The midges in this picture are a gray and black (the orange is called daphnia). You may want to take some samples if you really want to match the hatch. In march one of the most common colors is a dark reddish wine color. I also like to fish rainbow and purple UV colored midges. The larva are generally very skinny. Tying midges very skinny can be key to catching the picky fish. The adults and emergers tend to be black. Some times their belly will have a little color to it such as grey or cream. Most black flies such a Trailing Shuck emerger, Brook Sprout, or Griffiths Gnat work just fine.
The Power of Red and Pink
During the month of November and into December red and pink become very important colors to fishermen on the Green. Red, as in midge larva. Pink, as in eggs. Oftimes I will fish these two together, trailing a red midge larva behind an egg. While a red zebra midge works well, I also like red wd40's or simply red wire wrapped around a hook. I will fish midge larva from size 16-22. You could get away with going even bigger or smaller. As for the eggs, I generally fish a gigaglow in pink or apricot. The fish start to key more on the apricot as more roe start to show up in the water. These two colors will catch fish throughout the river and there is no need to fish on the reds to catch fish. I often pass by the reds to see if any big fish are about. The spawn is often a time to see and catch some of the bigger fish in the river. Remember to be respectful to the fish and others especially during spawn time as seems to touch a nerve with people. Best of Luck and we'll see ya out there.