bar-tailed godwits , To Alaska and back

A record-breaking godwit known as E7 is refuelling in the Firth of
Thames after having made it all the way to Alaska and back wearing a
surgically implanted satellite transmitter.

The female bird was
the first of 16 bar-tailed godwits tagged in February by ecologist Dr
Phil Battley, from Massey University, to return to New Zealand.

Data provided by the transmitter meant that Dr Battley could confirm her
route, with her entire migratory journey clocking in at close to 30,000
km, and the southern return leg at more than 11,500km.

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