Which birds are in your backyard? Here’s a guide for the changing seasons

September can be bittersweet, as we say goodbye to the migratory birds that spent the summer nesting and raising their young in Southern California backyards. Many species, including hooded and Bullock’s orioles, black-chinned and Costa’s hummingbirds, black-headed grosbeaks and cliff swallows, have already begun their journey to their winter grounds in Mexico and Central America. But soon our winter residents such as yellow-rumped warblers, dark-eyed juncos and flocks of white-crown