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Specimen Discussion

> Hendrickson size

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The Discussion

Jpsully	January 10th, 2007, 11:59 am
bedminster, nj Posts: 4	Jason: Looking at the fifth photo from the top (the one with the ruler under the fly), it would appear that if you were to rotate the fly just a bit to the left, it would show that the fly is over one inch (25mm) long. That would make it twice as long as any Hendrickson I have ever seen. The average Hendrickson (to the best of my knowledge) is usually around 10-12mm (or about 1/2 inch), hook size 10-12. The hook size just doesn't seem to fit either. Where am I going wrong when looking at this fly (and hook)? JP
Martinlf	January 10th, 2007, 12:42 pm
Moderator Palmyra PA Posts: 3233	JP, Unless I'm mistaken, I believe that the ruler Jason is using is metric, that each little increment is one mm. I then see the bug measured at about 9-10 mm in the photo (not counting, of course the tails), and size 12 fits your accurate observations about the typical Hendrickson hook size. Now, when and where will we start seeing this bug come spring? I'm ready now.
	"He spread them a yard and a half. 'And every one that got away is this big.'" --Fred Chappell
Troutnut	January 10th, 2007, 12:54 pm
Administrator Bellevue, WA Posts: 2737	Louis is right: it's a metric ruler, and the fly's body is about 11mm long.
	Jason Neuswanger, Ph.D. Troutnut and salmonid ecologist

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