Minor Problem
I like to watch for interactions between individuals or species when I'm birdwatching. I have noticed other birds sometimes looking over the shoulder of feeding Spoonbills. In this case a Tricolored Heron seemed to be really crowding the Roseate Spoonbill while it was busy feeding. I speculate that the spoonbill's reciprocal bill movement stirs up prey from the bottom, thereby providing opportunity for the heron to grab a bite. It seemed to be a commensal relationship, ie, not harmful to either participant, but apparently the big guy was not amused and was obviously becoming quite irritated.
Minor Problem
I like to watch for interactions between individuals or species when I'm birdwatching. I have noticed other birds sometimes looking over the shoulder of feeding Spoonbills. In this case a Tricolored Heron seemed to be really crowding the Roseate Spoonbill while it was busy feeding. I speculate that the spoonbill's reciprocal bill movement stirs up prey from the bottom, thereby providing opportunity for the heron to grab a bite. It seemed to be a commensal relationship, ie, not harmful to either participant, but apparently the big guy was not amused and was obviously becoming quite irritated.