The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
I live in the Yakima Valley (Washington State), and while working in the vineyard the other day I found this little guy. Our vineyard is about 10 miles north of the Yakima River, but there are numerous waterways used for irrigation surrounding the property, all of which come from the Yakima River. I usually fish the the Yakima this time of year, and we have a nice baetis hatch of what I am thinking is Baetis bicaudatis, usually a size 16-18. This one however is about one "size" larger, a #14 or so. Also, the abdomen seems pretty dark for the ones I usually see on the Yakima. Anyways, I am thinking either Baetis brunneicolor, or Baetis tricaudatus/vagans. So, the picture is of a spinner, and unfortunately I did not get a good shot of the penes, but there is a good view of the hind wings, and decent fore wings. Any ideas? Thanks in advance.
Does the terminal segment to the genital forceps appear at least a little elongate to anyone else?
Baetids are difficult
McCafferty & Waltz '86
Because we possess only one reared female subimago of B. magnus and one associated but not reared male adult, and because adults of the rhodani group are essentially inseperable at the species level (emphasis mine) on the basis of current information, any description of the adult at this time would be tenuous.