Water stick insects favor being on the surface of the water because this is where their food accumulates. Also, if they were under the water, they would not survive.
The insect uses the waters surface tension to walk where others canβt. His only problem comes from below.
Water bugs would be found in or near the water. For instance, the Water Stick Insect hides amongst reeds and stems where it waits, camouflaged, to ambush its prey. It uses its long, thin 'tail' as a siphon for breathing: it protrudes above the water's surface and acts just like a snorkel.
due to surface tension
The water stick insect breathes oxygen even though it can swim under water. It has a long tube that comes off its back through which it inhales and exhales.
Tadpoles, insects and small fish
surface tension
the surface tension on the top of the water so if you look at a glass of water when it is full and about to overflow there is a hump thing its not flat that is how they can walk on water
A high surface tension
Water. Stick. Insect
Yes, all stick insects are vegetarian. Leaves are their main diet. (The water stick insect, or water scorpion, is a different family. It is a carnivore.)
Stick insects do not live in water. However, insects that live permanently submerged in water for part of their lives (such as mayfly larva) do have gills. Others like mosquito larvae do still come up to the surface to breath air and still others like water beetles carry a bubble of air with them underwater.
Pond skimmers