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Probably the pink variety of Nymphaea alba. The lotus species (Nelumbium sp) is different, with leaves and flowers above the water, not floating.
Obviously a moth. Family Drepanidae?
Probably Pycnoporus sanguineus, very common throughout the tropics.https://en.wikipedia.org/wiki/Pycnoporus...
I mean African iris.
Not sure, but probably a Psathyrellus sp. There are many species around the world. You might check the possibilities in your region.
Are you sure about the ID?https://fr.wikipedia.org/wiki/Coprin_che...
You might check in the Nepidae family of aquatic bugs.
In French Guyana I have often seen flocks of those tiny black-and-red nymphs. Looks like the same species.
https://en.wikipedia.org/wiki/Megacyllen...??? Megacyllene seems to be a beetle.Silvery checkerspot = Chlosyne nycteis.