Dr Russell Wynne of the NOC who is based there with my nephew a fellow there are satellite tracking some Balearic Shearwaters now and have also fitted some with geolocators in the Balearic Islands with the GOB coleagues of mine who hope to tack them to the Channel moulting grounds.
More on the Bird Guides website.
Bertram.E.B.Bree of CRBPO and EURING schemes going soon to do
some tracking with a device weighng a third of a gramme of Aquatic Warblers
in Brittany and other passerines.In Maryland new 5 gramme satellite transmitters are being used to track migrating Knots called Red Knots.