Bar-tailed Godwit, satellite antennae, tag Z0 and migration path

A photo of the Bar-tailed Godwit with a leg tag of 'Z0' and a satellite transmitter antennae emerging from rear feathers.  Z0s migration path is shown in the inset. This bird migrated from the breeding grounds of southwest Alaska to New Zealand where it stayed to eat and fatten up and then migrate back to Alaska via the Yellow Sea.