Cardinal as Spotter

I knew that tomato plant had a hornworm but I couldn't find it yesterday.  This morning I saw a cardinal precariously perched on a tomato plant pecking at something that was swinging away and back.  It tried several times and then flew off.  I was curious because I hadn't seen a cardinal on a tomato plant before so I walked closer.  It had been pecking at a hornworm! Good job, cardinal!