Guy Shorrock – Arctic Tern

A remarkable traveller

Guy writes: Christmas is a time for many things, including travelling as people move around the country to see friends and loved ones. Spare a thought then for the arctic tern. I am sure many will be aware of its epic annual migration from the top of the world to the bottom and back again.

This photograph was taken on the Farne Islands, a group of islands off the coast of Northumberland, in 2014 and shows the exquisite beauty of these birds. I always find it hard to believe that something which appears so delicate and fragile, and weighs the same as a bar of chocolate, has evolved to travel these unimaginable distances. Modern technology is now providing an even greater insight into just how utterly astonishing these journeys actually are.

In 2015, several arctic terns on the Farne Islands were fitted with geolocators as part of a study carried out by scientists at Newcastle University for BBC’s Springwatch. The following year when some of the devices were recovered, it showed one bird had travelled 96,000km (59,650 miles) during a journey to its winter home in the Weddell Sea, Antartica before returning to the Farne Islands. A distance of more than twice around the planet.

In the UK Arctic terns are Amber listed in Birds of Conservation Concern 4 (2015 update) with a decline of around a third in the breeding population over the last 25 years. Arctic tern breeding success can be heavily influenced by declines in sandeels and in some years whole colonies have produced very few young. The increasingly obvious changes in our oceans are likely to have further consequences for this remarkable traveller.

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2 Replies to “Guy Shorrock – Arctic Tern”

  1. Remains of a ringed arctic tern were found on the roof of Derby Cathedral in August 2007, the prey of one of the resident peregrines.
    The Swedish ring had been put on the bird as a chick on an island in the Baltic in summer 2002. So this individual had been down to the Antarctic and back five times in its life therefore possibly travelling some 60,000 x 5 = 300,000 miles in the intervening time.....
    In April 2007 easterly winds were blowing returning flocks of this species north from their usual return route up the English Channel. A flock of 50 or so was seen at a reservoir a few miles from Derby in late April and we believe our ringed bird was probably among them, singled out by one of the city's falcons.
    (As far as we know, it's the only arctic tern these falcons have caught in 11 years of nesting there).

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