
The California sea lion is an intelligent, slender-bodied seal with a gregarious personality, remarkable speed and agility on land, and barklike vocalizations. They are found along North America’s western coast, and some as far as the Galápagos Islands and even the Sea of Japan. In early June, bulls set up breeding territories, or rookeries, on sandy or rocky coasts, and each bull mates with a harem, or group of cows, of 5 to 20 females. Bulls defend their harem and territory by patrolling the area on land and in the water, barking loudly, posturing at trespassers, and sometimes fighting with intruding males.
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