On my most recent trips to Buck Mt. Creek I've seen a lot of spiny crawlers: two species, Ephemerella dorothea and Drunella tuberculata. Today I saw one E. dorothea and no Drunellas at all -- but I did see four Eurylophellas. This is a small nymph: of those I found there this morning, the largest -- the one in the photo at the top of the page -- measured about 7 mm.
It is largely those large gills on segment four of these nymphs that let us ID this particular genus. Beaty ("The Ephemeroptera of North Carolina," p. 28) describes the genus this way: "gills on segment 4 operculate and largely covering the gills on 5-7; paired tubercles on abdominal segments 1-7; abdominal segment 9 distinctly longer than segment 8." These are the gills:
And the tubercles on segments 5-7 are pointed out in this photo taken last year.
Last year I concluded that I was finding Eurylophella verisimilis at BMC because of those dark gills on 5-7. I'm no longer sure of that species ID, so let's just leave this at the level of genus.
Here's another look at our nymph...
And here's a shot of one of the small nymphs that I found.
While I was pleased to see Eurylophellas, I was surprised to see this one: a "water scavenger beetle," Hydrophilidae.
The wierd thing is that as I was getting out of my car at the stream, I was thinking about the various beetles I've found at this stream. I've seen Dryopids, riffle beetles, and whirligig beetles -- but, I said to myself, I've never seen a water scavenger beetle at Buck Mt. Creek. And of course I found three of them in the first clump of grasses and roots in which I looked!
Water scavenger beetles come in two different shapes. The other one looks like this:
This larva was found in the Moormans river on 9/29/11. Actually, it's the bodies that differ -- the heads look the same.
1. Something I was not expecting to see, a green stonefly, genus Alloperla.
Here's a photo of one I found at the Doyles River on May 23rd (!) of last year.
2. Another "long-horned case-maker," presumably the same species I found here before, Ceraclea maculata. I didn't keep it -- but the head and the case look exactly the same.
3. Our first Perlesta common stonefly of the season. This is the one that we will be seeing a lot of in June and July.
4. And, "signs of summer," a narrow-winged damselfly nymph (Coenagrionidae), and that odd-looking club-tailed dragonfly, Hagenius brevistylus.
I also saw quite a few Darner dragonflies. We move into summer.