“We decided to make the most of a quiet afternoon by ringing some Manx Shearwater chicks. With over 15,000 pairs on the island, most with a single chick down a single burrow, you’d be forgiven for thinking this was an easy, straightforward task. But the burrows which the Manxies excavate can be deep and awkward, and a few inconsiderately placed rocks and right angle bends in the tunnels made finding the chicks an epic task. Some of them are becoming quite fat but still have another 25 or so days left in their burrows before they make their first flight. The grey down which covers their body like a giant fleece insulates them well from the damp conditions in their burrow. We take wing length measurements as well as weights and this allows us to calculate their age and how well they are being fed. This particular chick is around 50 days old, and weighed over half a kilogram!” © Richard Brown
http://bardsey.blogspot.co.uk/2011/07/couple-of-grasshopper-warblers-blackcap.html
