As more than a billion birds begin their spring migration across California to their summer breeding grounds in the north, the state's birdwatchers are getting out their binoculars, maps ...

I knew where one of my brothers kept his old field guide, so, with book in hand, I stood at the window and started to figure out what was what. Yes, that one was a blue tit, and the larger one was a ...

In a new study published in Citizen Science: Theory and Practice March 28, researchers from the University of California, Davis, show that citizen science data from iNaturalist and eBird can reliably ...