Oleander Aphid (Aphis nerii) 9/14/11 PL

First spotted a few days ago feeding on my Hoya (wax plant), they won't be there for long. Top right, they're busy sucking the juices of the runners of a Hoya. The picture below that shows a red aphid. What's up with that?

Top left, a close up, and below that an attempt at naming a few parts of an aphid.

Aphids can be many colors like green, black brown, pink, or almost colorless, but Oleander Aphids are easy to ID because of their unusual bright yellow coloration.

The first circle on the left shows "a tail-like protrustion called a 'cauda' above their rectal apertures."

They have segmented antennae.

The spike-like thing coming down from the head is called a stylet, their "sucking mouthparts".

"They have long, thin legs and two-jointed, two-clawed tarsi."

Their eys are compound.

The last circle in the lower right shows "a pair of cornicles (or 'siphunculi'), abdominal tubes through which they exude droplets of a quick-hardening defensive fluid containing triacylglycerols, called cornicle wax. Other defensive compounds can also be produced by some types of aphids."

Thank you, Wikipedia and bugguide. I think, maybe, I learned more than I wanted to know. :o)