After the birds and flowers on the biodiversity day on 31 May 2014, to small animals living in water. Like the flatworm on this photo. This worm was photographed on a small egg spoon with water on it. A macro lens was really necessary to photograph a tiny animal like this. Research still has to find out which flatworm species this is.
Many small animals were caught with a landing net in the ditch near the allotment gardens. Water is rather clean there, so much biodiversity.
There were various leech species. Like Erpobdella octoculata, which was named in 1758 by Linnaeus. And Theromyzon tessulatum; which lives in ducks’ bills. One female Theromyzon tessulatum had eggs.
Bugs included specimens of water boatman; a species which may survive in polluted water. There was also the lesser water boatman. And a much smaller related species: Plea minutissima.
And a saucer bug as well.
There were nymphs of various damselfly species.
Crustaceans were represented by an aquatic sowbug.
And mollusks by a common bladder snail.
Meanwhile, a reed warbler sang.
There were various, still small, common newt larvae.
Among the very smallest animals were Cyclops and Daphnia crustaceans.
Not in the ditch, but in reed beds along the ditch: a beetle species, Donacia vulgaris.
Edible frog sound.
One very small fish is caught. Too young still to say which species. Among fish species living in this ditch are: northern pike, perch, ninespine stickleback and spined loach.
A water mite. One of scores of species in this ditch.
Finally, a great silver water beetle larva.
After the research, all animals went back into the ditch.
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To reproduce, bizarre flatworm may have sex with own head:
Zoologists reported the “first described example
of hypodermic self-injection of sperm into the head.”
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