Why do mosquitoes bite in the night rather than the day?

Question

correction- why do mosquitoes MOSTLY bite in the night rather than the day?

Answer 1

It does, of course, vary from mosquito species to mosquito species, but most of the ones we find most annoying are most active during dawn and dusk - an activity cycle that is known as crepuscular.

At these times, wind speeds are generally calm, which helps mosquitoes accurately find blood hosts by following scent cues - like carbon dioxide exhalation, or the smell of lactic acid in perspiration.  It also helps them when flying, as they are not very strong fliers, and even a moderate breeze can blow them around.

Temperatures at dawn and dusk are usually better for mosquitoes too.  Being small and spindly, and ectothermic, they are actually quite vulnerable to hot, dry conditions, and can easily overheat and dessicate in direct sunlight - so they prefer some sort of cover or shade - conditions much like dawn and dusk.

Predators are also an issue.  Right at dawn and dusk is sort of the changeover time - birds are going to sleep, and bats are just waking up and moving out to start hunting - and so by being most active at dawn and dusk they avoid being eaten.

Answer 2

it is easy to approach . secondly  it is found that every mosquitoes did not bite in night . I think you know about that , but really easy to approach