This happened Monday, so I’m a little late with the post, but my first rose blooms always mean there are Light Cahills on the lower end of the Farmington. The hatch is already progressing upstream. Call them what you want (Vitreus, sulphurs, etc.) — I see these first signs of summer as simple creamy mayflies, and I go with the generic term of Light Cahill, which suits me just fine.
Remember, you are matching size, color, and profile. These first invaders are usually a size 14-16 — sometimes you get a big 12. For dry flies I like the classic Catskills Light Cahill, the Pale Watery Wingless AKA The Magic Fly, and the Usual. For wets, the Light Cahill winged, the Pale Watery Wingless, and the Partridge and Light Cahill. Any of the creamy Leisenring or North Country patterns will also serve you well.
Patterned after a classic North Country spider, the Partridge and Light Cahill is another example of a fly that is ridiculously simple and devastatingly effective. The first time I tied this fly, it sat in my box, unused, for the better part of four years. Then came a late May evening on the lower Farmington. Creamy mayfly duns were out in force. Trout were slashing at the flies, their feeding frenzy creating a cauldron effect on the river’s surface. I tied my experiment onto my team of three wets, and the trout overwhelmingly showed their approval. To the vise, good angler, then fish the Light Cahill and Sulphur hatches with confidence. The vote will surely be yes for you, too.