addition to experiment L5:
Respiration of mosquitos needs air even in a water butt
1 Mosquitoes lay their egg parcels into water butts after having sucked blood from men.
   In the left photo an egg parcel can be seen floating on a small vial full of water.
   After some days hundreds of tiny white worms are moving between the surface (for breathing)
   and the bottom (searching for food).
2 In water butts these larvae rapidly grow and reach their final size  (2. photo from left):
  They are attached to the water surface and use a snorkel for breathing air from outside.
3 Soon there is a first rapid change of the body shape (3. photo from left): Pupae have their
  snorkels an the thicker front part of their bodies.
4 A few days later you will see the first males (photo right):
   They have soft mouth parts. So they are unable to sting like the females which are hatching
   later.

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Fountain water, another fresh water environment   Green plants recycle used air                 home