Benedict Canyon is also part of the Pacific Flyway. As a result, the resident Southern California bird species often share company with neo-tropical migrants and other species, such as Canada geese. There are over eighteen species of snakes and eight species of lizards. The most common snakes are pacific rattlesnake, gopher snake, California king snake, and California striped racer. The rattlesnake is the only venomous snake in California. They seek shade during the hottest summer afternoons and hibernate during the winter. The zone supports five species of frogs, three species of toads, and five species of newts and salamanders. As in most parts of the world, frog populations have declined, probably due to climate change and pollution. The widely scattered perennial streams still support unique populations of native fish. Topanga and Malibu Creeks contain tidewater gobies, arroyo chub, and the endangered Southern California Distinct Population Segment of steelhead. The Santa Clara River supports these species as well as the federally listed endangered, unarmored three spine stickleback. Some of the upper reaches of the Los Angeles River at the foot of the San Gabriel Mountains harbor populations of the Santa Ana sucker and speckled dace.