Titchfield Haven, Bird Ringing Update - August 2014

I have previously mentioned the slow start to the ringing season for us, but despite this the fine weather over the last month had helped us get back on track, and then came what was left of hurricane Bertha. This didn't stop our ringing activities on Saturday (9th) but Sunday (10th) was a complete washout. Despite this slight setback we have to date (up to 9th August) ringed 1233 birds of 29 species. As with previous years I have put together a summary of the nine most common warbler species that we catch at the site, and drawn comparisons with the last four years.

Summary of the Nine most Common Warbler Species ringed at Titchfield Haven

As can be seen from the data Sedge Warbler is again the most common species with 555 new birds ringed, followed by Reed Warbler with 260. Both species are on a par with the numbers ringed in 2010, and so maybe this year is not going to prove to be a spectacular year like 2011. Willow Warbler numbers are the highest of the five years, but only just, which is a promising sign. Grasshopper Warbler numbers are below average with only 103 ringed to date. Cetti's Warbler once again appears to have had a good breeding season with the second highest total of the last five years and Chiffchaff numbers appear to be consistent with previous years. Blackcap and Whitethroat numbers are low at present, but these species traditionally are slow starters with the peak numbers coming through in September.

Summary of Nine most Common Warbler Species

Of course there are always the odd surprises when ringing at the Haven and I have already posted about the Cuckoo, which was a real treat for us all. Other highlights have included a Woodcock, again a first for the site, three Kingfishers and a Bearded Tit. The Cuckoo will be probably end up being the best bird of the year, but it will undoubtedly be backed up by a Wood Warbler. We have only ever ringed a handful of Wood warblers at the site and those have mainly been captured in July; the individual below was captured during the first week of August.

Wood Warbler - Titchfield Haven (Barry Duffin)

Wood Warblers are a large a distinctive Phylloscopus warbler with bright green upper parts that contrast strongly with the pure white underparts. The under tail coverts are also pure white and the throat and upper breast is bright yellow, all in all a striking bird.

Wood Warbler (left) Willow Warbler (right)

Wood Warbler (left) Willow Warbler (right)

Titchfield Haven - Bird Ringing Update August 2013

The bird ringing season is already well under way at the Haven, and after a slow start the autumn migration is now in full swing. Despite the slow start the daily totals were bolstered by good numbers of breeding residents with the Cetti's warblers being the most numerous species. To date 33 different birds have been captured, with 25 of those juveniles and three new adults, the rest were retrapped adults. Evidently this species has had a good breeding season.

The grasshopper warbler migration started about 10 days later than last year and has so far not reached the dizzy heights of previous years. In fact we have only been averaging 12 birds per day and this year have only ringed 147 birds; all of those have been juveniles. Sedge warbler numbers have been very good and today (10th August 2013) a catch of 272 birds (including 6 controls) was made up of 187 (including 3 controls) birds making the total for the year 647. This week an extraordinarily dark juvenile sedge warbler was captured.

Dark Sedge Warbler Acrocephalus schoenobaenus (B.S Duffin)

As can be seen from the pictures the bird was generally dark rusty brown in colour on both the upper and underparts, a truly striking individual.

Underparts of Dark Sedge Warbler

Surprisingly this is not the first time I have seen a bird with this colouration. In 2010 a similarly coloured reed warbler was trapped at the Haven during the autumn migration. This bird was different in that it seemed to have a brown sticky mess on its forehead, which suggested that the bird may have fallen into something, this did not appear to be the case with the sedge.

Dark Reed Warbler A. scirpaceus from 2010

The pattern of migration this year is again similar to previous years with sedge, reed and grasshopper warblers being the most numerous. Willow warbler numbers are now starting to build and today we ringed 17 new birds bringing the total to date to 50. All of the willows were again juveniles including a very pale washed out individual. According to Svennson northern populations are more greyish-white and generally lack any yellow tones.

Juvenile Willow Warbler Phylloscopus trochilus of the northern/acredula type

This bird was was exactly that, a pale greyish-white bird with no yellow tones. When compared with a typical willow warbler it was possible to see just how striking the bird was.

Willow Warblers - both these birds had a wing length of 61.5 mm and therefore
we thought that they were ideal for comparison. The pale left bird weighed 7.4 grams
whereas the normal right bird weighed 8.5

And if an unusual sedge and a northern willow wasn't enough, we were also treated to a very smart wood warbler. Every year we try for this species and have only ever caught a handful. Today's bird was the first for four years and added to what was an excellent days bird ringing.

Wood Warbler Phylloscopus sibilatrix the first ringed at the haven for about four years

Our tally today included six controls, three each of sedge and reed warbler. That brings our total of outstanding controls for the autumn to 18 including one French and one Spanish, and we are not even halfway through the season yet. Our total for new birds ringed stands at 1309 birds of 24 species, 108 birds have been retrapped.