nightfly's picture

Water beetle larva.

Observed: 17th April 2011 By: nightflynightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebrates
17 April 2011 (188)
17 April 2011 (188)
17 April 2011 (183)
Description:
Identifications
Species interactions

No interactions present.

Comments

nightfly's picture

Thanks Limnoporus, Having

Thanks Limnoporus,

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.

Cheers,

Cathal.

Refugee's picture

Hand print

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.

Refugee

nightfly's picture

Hi Refugee, Ive been studying

Hi Refugee,

Ive been studying my hand, yes I think I'll try as you suggest, I'm guessing nearer the 20mm.

To be continued...

Cathal.

nightfly's picture

Hi Refugee, Ive attached the

Hi Refugee,

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.

Cathal.

Refugee's picture

Third

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.

Refugee

Refugee's picture

Agree

Is i said your hand is the best reference for size you can have, you have got it for life!

Refugee

Dluogs's picture

IKEA give away free paper

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.

nightfly's picture

Hi Dluogs, I usually carry a

Hi Dluogs,

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,

Cathal.

Dluogs's picture

There's plenty of excuse -

There's plenty of excuse - particularly with wet hands from handling water creatures, there's a limit to what you can do.