Characteristics of Aphids Aphids are soft-bodied insects which have a myriad of colors, including but not limited to red, brown, yellow and green. They are very small, and will usually be oval in shape. You can also easily pick up their antennae and pair of wings when you have a closer look. The aphids also have mouth parts which are specially made to perforate the leaf surface and draw out the contents of the leaf. A closer observation will reveal that the aphids are found in groups or ...