In Still Waters

x6 images. Double click to enlarge.

Culex larva

They say when you are out in the wilds and need to drink water from the land you should boil it first … and you can see why. The above image is a mosquito larva from the genus Culex. The larva lives submerged in water and feeds on particles of organic matter, microscopic organisms or plant material. Culicine larvae float with the head low and only the siphon (breathing tube) at the tail held at the surface of the water. After several instars it then develops into a pupa, then eventually into an adult like the one below … a real bloodsucker and potential vector of one or more important diseases of birds, humans, and other animals.

Culex adult
Dasyhelea larva

Often found in ponds or pools, puddles, tree hollows where water collects, and in gardens in birdbaths, tubs, gutters, and other places where standing water collects, members of the family of biting-midges Ceratopogonidae can be found.

Dasyhelea larva

These are most likely Dasyhelea genus, but the adults of these do not actually bite or feed on vertebrate blood or predate on other invertebrates. The adults take nectar only, an unusual feeding behavior within the family Ceratopogonidae, which includes the Highland Midge (Culicoides impunctatus), which do bite humans and feed on blood, often occuring in many numbers. Some species of Dasyhelea are important pollinators of plants such as cocoa trees and rubber plants.

Dasyhelea pupa

The larvae are primarily herbivorous, feeding on green algae, diatoms, fungi and detritus.

Dasyhelea pupa casing