I forgot about a pot in the garden that needed holes drilled in it. I'm embarrassed to say that it was full of water and breeding mosquitoes. I went to dump it out and discovered these guys. They are about a half inch long and maybe a quarter inch wide and look like dark shrimp. They have a fin on their tail like a shrimp or a lobster. I saved five of them before dumping everything out. I'll probably dump them in one of my ponds. If I dump them in the koi pond, they'll be eaten for sure. If I dump them in the dragonfly larvae pond, maybe they'll live, so let me know what you know, so I can decide their fate!
This guy looks like he's out of the water but he's actually at the bottom of this big jar.
CLOSED: much bigger than mosquito larvae and looks like dark shrimp
Woops, got the width wrong. They're a little less than 1/8" wide.
this is a pupa of a mosquito, commonly called a 'tumbler' because of its swimming action when disturbed. When it has completed development, the adult usually will step out of the pupal 'skin' on to the water surface before taking flight; see http://www.dpughphoto.com/images/mosquito%20emerging%20durham%2090806%201.JPG for an image.
Wow, I guess I'd never seen them at that stage before. I guess they're getting fed to the koi! Thanks!
It's a mosquito pupa, commonly called "tumbler".
http://mosqpro.com/mosquito_biology.php
Mosquito pupae are very actives, so it's not easy recognize like that. I suggest you feed your koi with them, or, if you want to observe metamorphosis, cover the jat with metallic cloth for don't scape mosquitoes
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