I don't know shit about mosquitoes and therefore do not feel qualified to comment on it. Like, fuck mosquitoes, but don't they still have an ecological niche? But I'm sure people smarter than me have accounted for that, so... All I know is "Mosquito yucky :("
Not really even, they act as an incredibly small portion of many animals diets (for example they’re around 4-8% of bat diets as opposed to a much higher percentage for flies). They are really just to small to provide any meaningful nutrient or caloric intake.