These are flying around my four o clock flowers in the evening. I watched them again and noted they are sticking their long mouth part into each flower. I saw one tonight in my tomatoes going from plant to plant but instead of looking for flowers, the rear end was touching leaves. It was also going from plant to plant. It was just as fast as the ones eating nectar. I am looking forward ha ha to a bunch of hornworms soon. I always wondered before why there would be only one or two big hornworms that I could find on a tomato plant. It looks like they give their babies a whole plant with no competition.