Home with the Catch: Rhinoceros Auklet

Rhinoceros Auklet returning at Dusk with a Catch of Sand Lances and Squid
The grayish-white protuberance on the bill the horn that inspires the Rhinoceros Auklet’s name – is fluorescent and thus highly visible to their fellows when diving for fish or flying in dim light.
Teuri Island, Hokkaido, Japan, June 19, 2018

You might encounter this puffin relative just about anywhere along North America’s Pacific coastline, and in fact there are breeding populations scattered from Canada through Alaska’s Aleutian Islands. But perhaps the best place to see Rhinoceros Auklets is on Terui Island off the west coast of Hokkaido where they gather in the hundreds of thousands to nest – the largest Rhinoceros Auklet breeding colony in the world.

The northwest cliffs of Teuri are pockmarked with burrows which the auklets have dug deep into the sandy soil to keep their eggs and chicks safe from gulls and other predators. During the day, the parents leave their chicks behind as they venture out to sea where they dive for food – primarily Sand Lances and squid. As twilight gathers, the adult auklets return to home, somehow sorting out their burrows from among the tens of thousands of similar tunnels. Gulls await the returning auklets, keen on stealing an easy meal. This is an example of why for many species it is so important that their numbers remain vast. Were only a few auklets to return, they’d each make an easy target for the waiting gulls. But with hundreds of thousands flying in, the relatively few gulls are overwhelmed, and although the gulls manage to take a few meals, most of the auklets make it safely to their burrows where hungry chicks are waiting.

On Terui Island, guides are available to take birders out to the nesting site to observe the spectacle of returning auklets. Along a pathway, a few low lights allow for a good view of the birds as they scurry through low, dense vegetation. Some of the auklets will be quite close, but in order to get good photographs a fast lens and a camera capable of handling high ISO values is necessary as using additional lighting is not permitted (and would be wrong, even it were). You’ll be hand-holding and so you have to hope you catch one standing still to momentarily collect its thoughts, as in the above photograph. JD

Teuri Island: The Place to be for Rhinoceros Auklets

Rhinoceros Auklet Breeding Grounds, Teuri Island
Hokkaido, Japan, June 18, 2018

Not a lot appears to be going on in the above daytime photograph taken on Teuri Island’s cliff-lined northwest. The 2.1 square mile island (5.5 square km) hosts the breeding grounds for several species of birds, most notably seabirds. The holes in the above photograph are the burrows of Rhinoceros Auklets, a species for which Teuri serves as the world’s largest breeding ground.

While it doesn’t appear that much is going on in the photograph – a few gulls milling around notwithstanding – at the end of each burrow, which may be up to six meters (20 feet) in length, a Rhinoceros Auklet chick is waiting for twilight when parents will return from the sea, stomachs, gullets and bills crammed with catches of sand lances and squid. Gulls – primarily Slaty-backed which also breed on the island – will intercept some of the returning adults, but most will make it past the parasitic phalanx. Recent estimates put the auklet population at around 400,000 breeding pairs. Add in the chicks and the species count rises to over a million. Perhaps you can imagine the sight and the cacophony as night gathers and hundreds of thousands of adult auklets return, evading squawking gulls, somehow locating the specific burrow each parent calls home.

Teuri is also an excellent place to see Spectacled Guillemots, Common Guillemots and other seabirds as well as passerines such as Blue Rock Thrushes and Siberian Rubythroats. Regular, bicycle-friendly ferries from Haboro make it easy to get out to the island, and if you don’t choose to stay at the lovely campground (which you’re likely to have to yourself) there are wonderful inns offering comfortable accomodations and truly some of the world’s best fresh seafood.