Europe is 'different'. Some differences are related to interference [1].
The Eurasian woodcock is also 'different'. The bird flies at night. During the day the bird rests in places where there is no much light.
(The woodcock's weight is around 300/350 grams. There is no possibility, up to now, to track them with Argos/GPS PTTs.)
So,
(1) What could be done to try and track this small bird with its strange behavior?
(2) What can be said about the class A and B locations, usually the only ones one can get in its tracking?
Here a couple of works dealing with location accuracy: http://www.euskonews.com/0484zbk/gaia48404en.html and http://es.scribd.com/doc/58456473/Accuracy-of-A-and-B-class-locations.
[1]
https://www.microwavetelemetry.com/uploads/NewsletterPDFs/MTINewsletter_2005_Winter_page8.pdf
https://www.microwavetelemetry.com/uploads/NewsletterPDFs/MTINewsletter_2006_Spring_page8.pdf
