Refers to small flying insects.
Durante el verano, los amosquilas se convierten en una molestia para todos los que disfrutan estar al aire libre.
During the summer, mosquitoes become a nuisance for everyone who enjoys being outdoors.
Las amosquilas son especialmente molestas durante el verano, cuando están en su mayor número.
Mosquitoes are especially annoying during the summer when they are at their highest numbers.