The Linnets gave Andy and me the run around again this morning; they just weren't having our attempts at a catch. After three hours of watch and wait we came to the conclusion that the 150 or so Linnets of recent weeks are now wise to our antics. This idea was reinforced somewhat on our last visit of 12th February when two of those caught had been ringed in late 2008.
Linnets
Although the Linnets stayed clear we caught a single Skylark and a close encounter with another, two of the several around this morning, four or more of which were singing males.
Skylark
A quick search of our data showed that before today our Ringing Group had ringed just 5 full grown Skylarks scattered through the years from 1986 - in 1986, 1987, 1991, 2007 and 2010. We have had more success with the ringing of nestlings with 56 youngsters from about 16 nests over the same number of years.
Skylark Nest
A local project to find, map and ring nesting Skylarks would seem to be an ideal venture for a keen and dedicated young birder wishing to enhance their ornithological credentials.
The infrequency of catching a Skylark called for a check of the literature. Svensson reminded us that wing length can be a decider in separation of the sexes. In our case 111mm meant that we almost certainly had a male rather than the slightly smaller female.
Svensson
Ageing was much more difficult since both adults and juveniles have a complete moult including wings and tail during July to September, with the result that by the following spring, adults and juveniles look much the same. We found that our bird had very raggedy tertial feathers together with well-worn primary tips, all of which suggested a summer rather than an autumn moult; hence a likely adult of unknown age. A Skylark can live up to ten years.
Other birds this morning - Kestrel, Buzzard, 8 Chaffinch
If the weather folk are right, which they sometimes are, warm air emanating from the coast of West Africa could bring settled days plus birding and ringing opportunities very soon. Stay tuned.
Linking today toAnni's Birding Blog and Eileen's Blogspot.
