The bar-tailed Godwit flies from Alaska to New Zealand, and back again. One female took just 8 days to fly the 11,500 km, which meant she was flying at around 60 kph…

Tracking animals might seem a cinch in the age of GPS. But it doesn’t always turn out that way – the BBC website’s “Walrus Watch” has come seriously unstuck, with only one of the eight tags still working… A more traditional tracking solution – good old physical tagging – is explained in this article about Godwit migration.