I noticed a Mallard hen and was watching and photographing her when the gulls swarmed around her like bees do honey and caught her immediately after a Ring-billed Gull grabbed her bread right out of her bill.
Last year while I was camping and photographing at Red Rock Lakes National Wildlife Refuge I saw a feeding frenzy that involved Franklin's and California Gulls in the flooded grasses and Sagebrush flats near the Lower Lake.
I often forget that by backing up my zoom, swapping my long lens for a wide angle lens or backing up physically I can get the "whole picture".
There were quite a few Laughing Gulls on and near the shoreline, a few Ring-billed Gulls and two Reddish Egrets hunting on the beach that day.