Aphid

Aphids are small, sap-sucking insects of the family Aphididae within the order Hemiptera, commonly known by names such as greenfly and blackfly, though individual coloring varies widely even within a single species. Their life cycle is unusual: flightless females give live birth to female nymphs that may themselves already be pregnant, an adaptation known as telescoping generations, allowing populations to multiply quickly without males. Winged females typically develop later in the season to colonize new host plants, and in temperate regions a period of sexual reproduction occurs in autumn, with the insects commonly overwintering as eggs.