Wilson’s Storm Petrel
Iconic Antarctic seabird that can "walk on water"!
What you need to know about the Wilson’s Storm Petrel
Our Expert Says… "They have a really distinctive behavior of using both their wings and feet to "hop" or "bounce" on the surface of the water when feeding - it does look like they can walk on water! Despite its small size, they migrate for huge distances - quite remarkable when you consider their small size and the need to keep their wings beating rapidly to fly."
Wilson’s storm petrel is a small seabird that lives across the entire circumpolar region. It is thought to be one of the world’s most abundant bird species, with a total population estimated to be more than 100 million individuals.
Named after Scottish ornithologist Alexander Wilson, this storm petrel is only around 18cm (7”) in length, with a wingspan of about 40cm (16”). It has dark brown plumage all over, apart from a white rump area. It has webbed feet with distinctive yellow coloring and long, slender legs.
Wilson’s storm petrels nest in colonies all along the Antarctic coast and close islands such as the South Shetlands. They lay a single egg in small rock crevices or burrows that they scrape out of soft earth. Like many petrels, their legs are not made for walking any distance, and nest sites are chosen to ensure they need to take only a few shuffling steps from the landing site to nest, and then from nest to take-off point!
They feed mainly by picking small crustaceans like krill from the surface of the water, and they have a distinctive low-level flying profile, sometimes holding their wings up high as they flap and flutter to hover above the water. They do also sometimes take small fish and will sometimes plunge a short distance under the water’s surface to take them.
Outside of the breeding season, Wilson’s storm petrels spend their entire lives at sea, and you will often find them following ships throughout Antarctica, making soft “peep” calls as they swoop close to the water.
Interesting facts about Wilson’s Storm Petrel
For such a small seabird, Wilson's Storm-petrels migrate right into the northern hemisphere, some birds doing a circuit of the Atlantic Ocean!