Many insects enter the water for the first time in their life cycles either as eggs or young larvae.
Females of many aquatic insects oviposit (the act of laying or depositing eggs) in the water by dropping eggs on or into the water while in flight or after coming to rest on the water surface.
Some females enter the water and dive or crawl to an adequate underwater surface for ovipositing their eggs (e.g., some mayflies, caddisflies, and aquatic moths).
Females of some species oviposit in or on emergent or floating vegetion (e.g., damselflies and many dragonflies, some water bugs, water beetles, and aquatic moths).
Those larvae that come from eggs oviposited above the waterline in aquatic vegetation usually immediately crawl or fall into the water upon eclosion (hatching from the egg).