3 September 2017

August at Nanjizal

Whilst September is the official start of autumn, migration has been in full swing at Nanjizal during August. During the month, there was no coverage from the 14th-20th (peak Sedge Warbler passage) due to family holidays and a short period at the start of the month. None the less, a non-too-shabby total of 1,698 new birds was achieved. Unlike a lot of coastal sites, good numbers of birds at Nanjizal usually coincide with still clear nights where the birds can pick good habitat, rather than being happy to land on the first bit of land they see whilst flying through inclement weather. As you can see from the totals the main species trapped are species that have a tendency to migrate SSW in autumn, with Sedge Warbler and Blackcap both funnelling down in big numbers. This funnel affect also brings a good number of dispersing British Robin, as we always get good numbers at the end of August into September. Other species such as Willow Warbler are never in such large numbers.

Top 10 species ringed in August
Sedge Warbler 837 Reed Warbler 80
Whitethroat 192 Grasshopper Warbler 56
Willow Warbler 176 Robin 56
Blackcap 107 Wren 25
Chiffchaff 102 Garden Warbler 14

Ringed birds recaught during the month came from Scotland, Leicestershire, Wales, Cheshire and Belgium, all bar one being Sedge Warblers. Most species seem to have done OK, with Whitethroat, Blue Tit, Great Tit and Grasshopper Warblers picking up after a slow start. Song Thrush seem to have done very well locally. Other unusual species ringed included seven Tree Pipit, two Firecrest and two Spotted Flycatcher.

The month also saw a few rare and scarce birds appear in the nets, predominantly birds from the south, as there hasn't been much arriving on the east coast to filter down. A blast of south-eastlies on the 22nd seemed to do the trick and a good run started with a Wryneck on the 24th, white-spotted Bluethroat on the 25th (one of 224 birds ringed that day). The 26th then produced the second Melodious Warbler of the month (the first was on the early date of 10th) and for the second month in a row a Blyth's Reed Warbler, this time a first-year bird.

No comments:

Post a Comment