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Photo#336461
Yellow aphids?? - Aphis nerii

Yellow aphids?? - Aphis nerii
Punta Gorda history park, Charlotte County, Florida, USA
September 7, 2009
Size: 1/16th "
I found these yellow aphids or perhaps a new hatch of something. There seemed to be some small white insects and perhaps a very small lacewing getting into the picture too but, I did not get a shot where they were particularly clear.

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Yellow aphids?? - Aphis nerii Yellow aphids?? - Aphis nerii Yellow aphids?? - Aphis nerii

Moved
Moved from ID Request.

Aphis nerii
Oleander or milkweed aphids. With the bright yellow color and distinctive foodplant, they're perhaps the only aphids that can be positively ID'd from a photograph.

The bright color is a warning to predators that they are chemically protected by their toxic (or at least distateful) foodplant. Although it hasn't kept lacewings and lady beetles from eating the ones I've seen!

 
Plant
As alluded, the plant here is milkweed, likely bloodflower (Asclepias curassavica).