I fixed the headline. And I honestly don't understand how any journalist could write this story without mentioning the study author's own "extreme productivity".

I thought I had east coast gulls down, then moved west and there's a whole new set. I'm still salty that most gulls in California seem to be Western rather than California. I was very pleased to see a Buonaparte's gull on the local beach this summer

First time since 2016, and only the 4th time ever, according to sumodb

From Mike Luckovitch

I did find a sumo feed when I searched, though it's pretty rudimentary at this point