Birds are the most visible animals visitors are likely to encounter at Pinnacles National Park, with over 160 species documented in the park since 1908. Turkey vultures circle and soar in the skies overhead, while acorn woodpeckers and Steller's jays call noisily among the pines and oaks near the visitor centers. In the winter, dark-eyed juncos and California towhees perch and forage around willows and underbrush. In the spring and summer, black-headed grosbeaks and warbling vireos sing loudly from oaks and pines as they set up nesting territories. The variety of habitat types at Pinnacles attracts a great diversity of birds to the park. Many species can be found along the riparian corridors of Bear Gulch and Chalone Creek, because they provide an abundance of food, water, and shelter. In spring and summer house wrens, black phoebes, yellow warblers, and yellow-breasted chats are among the species seen in shaded riparian areas, and mallards and belted kingfishers are seen occasionally along the creeks and at the reservoir every year.