Recent content by Taxon

Yes, I sure do. jmoore and redeitz are absolutely correct. It is a Baetisca male imago, either B. berneri or B. carolina, as they are the only Baetisca species known from PA. With regard to redeitz's concern about the length of the forelegs, the one he probably saw on TroutNut.com was a...

T1- The mayfly featured in the video is Europe's largest mayfly, Palingenia longicauda, which belongs to family Palingeniidae (Riverbed Burrowers). The only North American mayfly species of that family is Pentagenia vittigera, which is found in the NE, SE, and SW.

Fred- Although wonderful video, I believe the narration was somewhat misleading. There didn't appear to be any footage of the mating swarms. However it did contain footage of mayflies emerging, molting to spinner stage, and female egg laying.

eye- I believe you are describing a Palmetto Tortoise Beetle. Of course, this may not be the genus or species which you have in Italy. However, if you look at photos of an adult, you will see the same sort of surface on its fore wings as is on a golf ball, which we refer to as dimples.

pmjasper- Many univoltine species (those with one generation per year) undergo their major growth in spring and early summer. Those species are often sufficiently small during the winter months, that they are much less likely to be noticed in seine samples.

Drew- Probably Gammarus fasciatus (Gray Freshwater Scud).

Jessie- Your mayfly nymph appears to be a crawler. The only crawler nymphs with two tails are Epeorus and Ironides, and it doesn't appear to be either of those. If I were to take a guess based on its general appearance, it would be Ephemerella, perhaps E. invaria (previously classified as E...

DoubleHaul- In their winged stages, they are a very stout little mayfly with big wings. There is only one N. American genus (Baetisca), and three species in NY, Baetisca lacustris, B. laurentina and B. obesa.

sstasiak- That is definitely a stonefly. The prothorax and hind wing shape leave no doubt. My guess based on size, color, and April presence in NJ would be a Least Sallfly (Haploperla brevis).

Ant- The following are the mayfly common names in use which include Hendrickson, and their current scientific name with prior scientific name appearing in parentheses: Common Name - Scientific Name Bluewinged Hendrickson – Ephemerella subvaria Dark Blue Hendrickson - Ephemerella invaria Dark...

AK- Not sure what information you’re looking for, but the reason the 2nd generation of Baetis tricaudatus is somewhat smaller than the 1st, is that the number of degree days required for them to mature is achieved in fewer calendar days as the water becomes less cold. Perhaps knowing the why...

Dennis- Much improved, but there are several remaining inaccuracies: - Ephemerella subvaria has not been reclassified; don't know where you got that one. - Ephemerella Invaria should be Ephemerella invaria. - Ephemerella lata has been reclassified as Drunella lata.

Dennis- In addition to the changes McA provided, you might want to update the following on your Northeast Major River Hatch Charts, as they have also been reclassified and/or are misspelled: Taeniopteryx fasciata has been reclassified as Strophopteryx fasciata Stenonema vicarium has been...

Dennis- Goodness no. I have nothing whatsoever to do with Mayfly Central. However, it is the definitive source for N. American mayfly taxonomy. Whenever it is updated, customarily once or twice a year, I compare the current version with the previous version in order to understand the...

Mayfly Central’s North American Master Species List was updated on August 30, 2006. Thankfully, there were very few updates, and none of any consequence to fly fishers. In any event, these were the updates: Family: Baetidae Heterocloeon amplum (Acentrella ampla) - species moved from...