S noticed this half eaten cherry tomato – & then noticed the worm. Hornworms love tomatoes and as you can see, they are really hard to spot. A single worm can decimate a moderate size plant in two days.
They can grow quite large. You can see my thumbnail & thermacell (mosquito repeller) for scale. I’d say this one was about 4″ long.
Their name is derived from the red horn on their tail (left in this photo, visible in front of a tomato.) the white dots at the other end are the mandibles.