The Animas is fishing well right now, with good midge, caddis, and BWO hatches. Flows are low and there is some moss coming down, so be sure to clean your flies often. Small flashback pheasant tails and zebra midges have been good patterns. With the low flows its best to go down to 5X leaders and tippet. Look for the deeper pockets until the water temps come down a little to let the fish move into the shallower spots.