These are small hornworm larvae (Manduca). To give you scale, the white bump on its side is a whitefly.
The plant the hornworms are chewing on.
If you are interested in more information and science activities for kids, try the Manduca Project.
Category: butterflies (Page 32 of 43)
No cropping was needed to capture this hackberry butterfly (named for the fact its caterpillars feed on the foliage of hackberry trees.) It was willing to pose.
Note about the photograph from last week:
Did anyone spot the egg this queen butterfly had just laid on the milkweed vine?
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For more information, see Roberta Gibson Writes.