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Having just read that dytiscus larvae can reach 5cm, I really want to find and photograph a mature one, they must be quite an impressive creature. The one above I have given as 2.5cm, to be honest that is probably a little bigger than it actually was, it may have been just under the 2cm- a measuring tape will have to be used more regularly now for accuracy on iSpot.
I can see the texture of your hand. You could count the number of lines in your hand print and compare it with a photo of you with a tape measure in your hand.
You do have a home made measuring device there.
Ive been studying my hand, yes I think I'll try as you suggest, I'm guessing nearer the 20mm.
To be continued...
Ive attached the original uncropped photo. Looking at that and using a ruler against my hand, the insect seems to be slightly over the 2.5cm. My original guess wasnt too bad, but measuring things as a matter of course will be more reliable in future and will save a lot of bother with guessing.
The third image looks best for the hand print count to me.
In some cases i include my foot in the image and quote the width of it as a reference.
Is i said your hand is the best reference for size you can have, you have got it for life!
IKEA give away free paper tape measures that are pretty accurate. I keep a short length of one of these in my camera case so it's always handy.
I usually carry a small tape measure with me and I had it on me the day I photographed this larva, I found quite an aray of invertebrate life on that day and took many photos. I just didnt go to the trouble of measuring everything I photographed that day but I wasnt using iSpot at that point. I will have to make it a habit to measure the small animals I take pics of from now on,
Thanks for your message, totally agree, with a small measuring tape in the camera pouch there can be no excuse,
There's plenty of excuse - particularly with wet hands from handling water creatures, there's a limit to what you can do.
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