Wildlife lovers and bird-watchers flock to Bolsa Chica Ecological Reserve, which has a 1,180-acre salt marsh where 321 of Orange County's 420 bird species—including great blue herons, snowy and great egrets, and brown pelicans—have been spotted in the past decade. Throughout the reserve are trails for bird-watching, including a comfortable 1½-mile loop. Free guided tours depart from the walking bridge on the second Saturday of each month at 10 am. At noon most Saturdays the public can help feed the center's marine and small animals. There are two entrances off the Pacific Coast Highway: one close to the Interpretive Center and a second one 1 mile south on Warner Avenue, opposite Bolsa Chica State Beach.