The Channel Islands are a rugged chain of islands off the coast of Southern California, known as the “Galápagos of North America” for their fascinating ecology. Incidentally, Channel Islands National Park is also the least-visited national park in California, and even lifelong Californians are often unaware of the unbelievable phenomena found in this scenic and undeveloped island chain.
The Channel Islands’ isolation has allowed sensitive habitats to thrive for millennia, and they are currently home to 150+ endemic plant and animal species found nowhere else on earth. Arguably, the most iconic species is the island fox (Urocyon littoralis), a small fox that has evolved into six distinct subspecies on six different islands. From the island fox’s unique features to its comeback from the brink of extinction in the ’90s, here’s everything you never knew…
Ecology, biology, and habitat of the island fox
The island fox is about one-third smaller than a typical mainland fox, around the size of a housecat. As the islands’ top terrestrial predator and largest mammal, the island fox is a keystone species that helps maintain the ecological balance of prey animals in the Channel Islands.
According to the National Park Service, six subspecies of island fox have evolved differently on six of the Channel Islands: Santa Cruz, Santa Rosa, and San Miguel, which belong to the national park; San Nicolas and San Clemente, which are owned by the U.S. Navy; and Santa Catalina, which has resort towns and is owned by the Catalina Island Conservancy.
The subspecies have small physical differences between them — for example, San Miguel foxes have one less vertebra in their tails and longer noses, Santa Rosa foxes have longer ears, and San Nicolas foxes are lighter in color.
The foxes are found in various habitats on each island, but they tend to prefer shrubby, wooded areas such as chaparral, coastal scrub, and oak woodlands.
Origins of the island fox
There are several theories about how the island fox could have first arrived in the Channel Islands, but the most recent archeological work suggests that the foxes were brought to the islands by humans. Human history on the islands dates back 13,000 years — in fact, North America’s oldest known human remains were found on Santa Rosa Island in 1959.
The native Chumash people may have been the ones to bring the island fox to the northern Channel Islands. They considered the fox to be a sacred animal, performing fox dances and using fox pelts to make arrow quivers, capes, and headdresses.
Reversing the island fox’s impending extinction
Although island foxes have always had low population numbers, their populations declined catastrophically in the 1990s due to predation by golden eagles and the decline of competitor bald eagle populations. By 2000, there were only 15 foxes on San Miguel and Santa Rosa Islands, and fewer than 80 on Santa Cruz Island — and by 2004, each fox subspecies was endangered.
Channel Islands National Park began an ambitious island fox recovery program in 1999 that included captive breeding, the removal of golden eagles, the reintroduction of bald eagles, and much more. Now, populations have rebounded, and their impending extinction has been reversed.
Visiting the Channel Islands
You can visit Channel Island National Park via a 1-2 hour ferry ride from Ventura or Oxnard. Each island has a designated campground with pit toilets, food lockers, and picnic tables, but there are no stores, restaurants, hotels, cell service, or other resources on the islands. Visitors must come prepared and bring their own gear.
Santa Catalina Island is a popular destination reachable via a 1-hour ferry from Long Beach, San Pedro, or Dana Point. Visitors often visit the small cities of Avalon or Two Harbors.
As for San Nicolas and San Clemente Islands, they are both owned by the U.S. Navy and not open for public visits.