Related Baetis Topic

Lastchance	February 4th, 2012, 8:48 am
Portage, PA Posts: 437	If I'm not mistaken, the first baetis nymphs that appear in the spring in PA have a light olive abdomen and a dark olive thorax. Which species is this? They appear to be size 18s and 20s. Bruce

PaulRoberts	February 4th, 2012, 9:35 am
Colorado Posts: 1776	The first to appear in NY (I was aware of, and if I remember correctly, AND if the name hasn't changed!) was tricaudatus. It's a #16/#18 (Mustad) as a dun. If the stream gives a second brood, the later summer ones are smaller.I've found tricaudatus here in CO Front Range streams too, and believe they are our first emergers. They are also #16/#18 as a dun. Ah! Nymphs, you say... Spring Baetid nymphs run from a light golden olive to a dark brownish olive. I assume that the lighter ones, often smaller, are lesser developed tricaudatus (they don't all mature at exactly the same time, dependent on thermal units apparently), and some are likely immatures of other species. The largest ones (#18/#20 is a good ballpark) with the nearly black wing-buds are the ones about to emerge.

Quick Reply

You have to be logged in to post on the forum. It's this easy:

Title	Replies	Last Reply
Re: BWO Color In General Discussion by Goose	3	Mar 27, 2013 by JOHNW
Re: Baetis Nymph, Is this it? In General Discussion by Lastchance	1	Mar 10, 2013 by Martinlf
Re: Baetid nymph color In Male Baetidae Mayfly Nymph by Martinlf	1	Dec 26, 2006 by GONZO
Re: light & dark cahill nymph patterns In General Discussion by Lastchance	2	Feb 18, 2008 by JAD
Re: new patterns 2010 In Fly Tying by Gutcutter	2	Mar 21, 2010 by Mfb1978
Re: z-lon or shuck material In Fly Tying by Flytyerinpa	2	Jun 9, 2017 by FishMe69
Re: Baetis softhackle In the Photography Board by Shawnny3	12	Jul 9, 2012 by Crepuscular
Re: Grannom vs Apple Caddis In the Insect Order Trichoptera by Walleye	7	Jan 11, 2017 by Afishinado
Re: 2 tail In the Identify This! Board by Sandfly	4	Nov 12, 2011 by Sayfu
Re: Another Unidentified Mayfly In the Identify This! Board by Calloway	10	Jul 27, 2008 by Phillyfired