Brown’s Farm: Saturday, 29th September 2018

Unfortunately, none of the rest of the group were available to give me a hand for this session, so I knew it would be hard work.  As it has been a while since I was last there, I paid a quick visit to the site Friday, to do a bit of a reconnaissance mission, to decide where to put the nets.  It was a worthwhile visit: a couple of Wheatear were seen flying along the hedgerow lining the main path (you can see the details of the farm on the Sites page), there was also a Mistle Thrush and lots of Meadow Pipit in the first field on the left out of the farmyard.  We had only ever caught a single Meadow Pipit previously at Brown’s Farm so I was quite keen to try for them on Saturday.

This morning I set my nets in the first two fields both left and right of the track.  I only set 5 short rides, as I didn’t want to tempt fate and potentially get swamped. The first two hours delivered just two birds: a Robin and a Goldfinch.  Our last visit, at the height of the drought, delivered only 9 birds.  I was really hoping we wouldn’t have a repeat!  As a bit of a hedge against that, I opened up another short ride just off the farmyard itself, as there had been a few House Sparrows larking about in that area. As is typical, the next round was significantly busier and I extracted over 30 birds.  The following round produced another 20, so I shut all of the nets to the right of the track, so that I could process the birds I had without worrying about them being kept too long in the bag and, certainly, to ensure that they were in the nets for the minimum possible time.  Even so, I extracted another 17 birds in the next round, and shut the rest of the nets, as I felt that was enough (and it was 11:30 by then, the breeze was beginning to get up, and I was going to be taking down single-handedly, which can be a nightmare at this site once the wind starts pushing the nets into the hedgerows).

It was a really decent catch: Blue Tit 3; Meadow Pipit 19; Dunnock 6; Robin 4; Blackcap 1; Chiffchaff 3; Chaffinch 3; Goldfinch 1; House Sparrow 11(2); Yellowhammer 16.  Totals: 67 birds ringed from 10 species; 2 birds recaptured from 1 species, making 69 birds processed from 10 species.  The recaptured House Sparrows were a nice find: one was ringed last year, the other was ringed as a juvenile in August 2015.

There are three notable things about this catch:

  1. we have now caught 20 Meadow Pipits at Brown’s Farm, 19 in this session;
  2. this is the largest catch of Yellowhammer I have had at any of my sites, bear in mind that there is no supplementary / bait feeding at this site to attract them in;
  3. no Linnets: that is perhaps the most remarkable thing, as this is the first time we have drawn a blank with this species at the site.

All in all, a very satisfying session.  Under the previous tenants we could not ring the site in the late autumn / winter months as they ran a pheasant and partridge shoot.  The new tenant, who also owns the farm next door, has moved the cattle onto that farm, and converted the cattle byres into stables, fenced off a couple of fields as paddocks, and rented them out to a number of owners.  Perhaps thoroughbreds and shooting don’t mix. Regardless of that, it means that we can ring the site over the winter months, which will give us a chance to compare the avi-fauna throughout the entire year.

A Plethora of Pipits: Blakehill Farm, Tuesday, 25th September 2018

Some time back we had scheduled to run one of our regular ringing demonstrations for the Swindon Wildlife Group at Blakehill Farm. We normally do Saturdays but, with the 22nd September coinciding with the Wildlife Trust’s “Country Comes to Town” event, we scheduled for Sunday, 23rd September.  Unfortunately, it decided to rain torrentially for most of the day and we had to cancel.

Having caught a decent haul of Meadow Pipits at Blakehill last time out, Jonny and I decided to have a session Tuesday morning to see if we could catch a few more.  Unlike the last session, we were sharing half of the site with the Trust’s cattle: cows with calves and their superb Aberdeen Angus bull.  The electric fence was off all morning.  The cattle clearly didn’t realise, as they dutifully stayed away from the wires.  We have found on several occasions that we can safely work around the cattle.  I suppose it helps that both Jonny and I have farming backgrounds, so have experience of working around livestock, and it helps that they just don’t seem interested in our nets.  We didn’t tempt fate too much, with just two net sets in the cattle field.

At 6:00 this morning the temperature was zero degrees Celsius and the place was shrouded in mist, which was quite handy, as it didn’t lift at all until we had the plateau nets open. We never got round to setting the perimeter track nets, as we started catching almost straight away. It seemed every bush had a Meadow Pipit or three sitting atop it. The temperature began to rise and the mist lifted.  By 10:00 it was a very comfortable 23 degrees Celsius and the birds became very active.

We were confident that there were well over 200 Meadow Pipits out on the plateau.  Between 8:00 and 11:30 we caught 131 birds, of which 98 were Meadow Pipits. An excellent haul, given that we only had half our normal nets set up.

As anyone who reads the West Wilts Ringing Group blog knows, we don’t target big catches: our preference is for low intensity sessions where we can focus on each individual bird and maximise the data from each and maximise the training opportunity for the team.  As all of the major migration hot-spot sites on Salisbury Plain or the Marlborough Downs are already taken, our approach is realistic for the sites we have available.  A catch of this size is unusual for my team.  It is our second largest ever.  Blakehill is our favourite place (when we can get on it: weather and sensitivity to ground nesting birds control access), because you never know what will turn up, but we are never going to catch 200+ Blackcaps on migration because rightly, given its special status as the main lowland neutral grassland reserve in the UK, there are no large areas of low scrub so beloved by birds on migration.  However, this catch came exclusively from the small isolated bushes on the plateau’s edge.  We think that one key reason for so many Meadow Pipits being about was that there were swarms of crane-flies around the plateau.  Being an insectivorous bird this must have helped to attract them in.

Blakehill 2

This was our net set.  The yellow line is the position of the electric fence, the red lines are the nets: mainly 6m, 9m and 12m and one 18m, providing the backbone of the complex set.  Meadow Pipits are slow flying and so the traditional method of catching them is to set up an open triangle of nets with a lure placed towards the back net.  The birds are attracted to the lure and, if the trappers run toward them, through the open end of the triangle, they fly off less carefully than normal and some end up in the nets ready for extraction and ringing.  We augmented the nets in that complex with several spring traps and Potter traps (a walk in cage with a tripwire mechanism) baited with live mealworms. They were, generally, a failure, with just one spring trap doing its job. The complex itself delivered 30% of the Meadow Pipits and 3 of the Chiffchaffs, so well worth the effort.

The list for the day was: Blue Tit 4; Great Tit 2; Dunnock 2; Stonechat 1; Whinchat 3; Robin 1; Meadow Pipit 97(1); Blackcap 1; Chiffchaff 4; Goldfinch 2; Linnet 1; Reed Bunting 11(1).  Totals 129 birds ringed from 12 species; 2 birds recaptured from 3 species, making 131 birds processed from 12 species.

This takes our Whinchat total to 12 for Blakehill this year, our best ever.  It was our first Stonechat of the year anywhere.  It was a cracking juvenile male:

2018_09_25stoch

There was also only our second Linnet for the whole Blakehill complex for this year.  We recaptured a Meadow Pipit from our last ringing session.  The other recapture was a Reed Bunting, but the ring it was sporting was not one of ours.  It will be interesting to find out exactly where and when it was ringed (and whether we have correctly interpreted age and sex).

The weather was flat calm throughout the morning until just gone 11:30 when, from nowhere, a pretty strong breeze sprang up and brought our session to an end.  It was a cracking session: the birds came regularly, but not in such numbers that we couldn’t easily manage them.  The variety was good and the Meadow Pipit catch astonishing.

Tedworth House: Thursday, 13th September 2018

As Dave Turner was scheduled to be involved in a team building exercise with the Help4Heroes crew at Tedworth House today, I was fully expecting to do this one solo. It was a very pleasant surprise when he rolled up just after 6:00 to help me get set up.  A good man. Furthermore, it meant that my monthly bacon sarnie was also back on the menu, before he met up with the “team” for their building exercise at 8:30. The hash brown was a bonus!

Unlike last month’s session, this one started brightly: the first round delivering 11 birds: two more than the entirety of August’s.  In those 11 birds were 2 each of Goldfinch, Greenfinch and Blackcap plus a Chiffchaff and a Dunnock  and the obligatory Blue Tits (3 thereof).

Round two delivered another 9 birds and I was hopeful of a good sized catch by the end of the session – and then it just died off.  The day was rescued by the last catch: a juvenile female Sparrowhawk.  We don’t catch many: this is the second caught at the site in 5 years of working there and only the sixth that I have processed in my 9 year ringing career to date.  Unfortunately, there is no photograph, as I was working alone.  I was able to show the bird to one family who were visiting the site, and they were absolutely delighted to see such a stunning bird close up.

The list for the day was: Sparrowhawk 1; Blue Tit 4(1); Dunnock 1(1); Robin (2); Blackbird 1(1); Blackcap 4(2); Chiffchaff 1; Goldfinch 2; Greenfinch 2.  Totals: 16 birds ringed from 8 species; 7 birds recaptured from 5 species, making 23 birds processed from 9 species. Of these, all bar 4 were juvenile birds.  The adults were the retrapped Blackbird and one of the retrapped Blackcaps, plus one each of the Goldfinch and Greenfinch.

I did spend some time looking at the absolute carpets of fungi covering the lawn leading up from the House to the Reflection Pond. A few photos.  I have no idea what species they are except for one that I think might be Coprinus comatus: the Shaggy Cap or Lawyer’s Wig:

F5

There were several other species around. These are some of the better looking ones:

If anyone can identify them I would be delighted to find out what they are.

Blakehill Farm: Saturday, 8th September 2018

We had a short but interesting session at Blakehill this morning.  I was joined by my old trainer, Ian Grier, plus Jonny, Steph, Lillie and our latest recruit, Tim Tapley from the Wiltshire Wildlife Trust’s Estates Management team and, briefly, by Neil Pullen, the Wiltshire Wildlife Trust’s Reserves Manager.

With nets set by the small bushes on the edge of the central plateau for any wandering migrants, plus a net set for resident Meadow Pipits, we were hopeful of a decent catch.

For once the perimeter track hedgerow nets, usually the source of the highest numbers of birds caught, caught absolutely nothing in 6 x 18 metre nets. Unfortunately we were immediately beset by two problems: we had light rain on and off whilst setting the nets and for the first full two hours of catching, despite the forecast suggesting that there was only the slightest chance of rain first thing, and the light breeze we started with grew steadily stronger, so that by 10:30 we had to take down.  Fortunately, the heavy rain forecast for mid-morning never materialised.

So, to have our best ever catch of Whinchat (9), our first ever Tree Pipit for the site, and 15 (out of goodness knows how many flying around) Meadow Pipits in the short time we had available was very satisfying.  The rest of the catch comprised 2 Whitethroat, 1 new and 1 recaptured Dunnock and 3 Reed Buntings.

 

One thing that was nice to be able to look at was the difference in the wing markings between male (top) and female Whinchat:
2018_09_08Whinc2
It was a shame we had to pack up early but we are rather of the opinion that this is going to be a long autumn migration season and we might well still have a good spread of migrants to show at the ringing demonstration.  As discussed with Neil, many Swallows are still rearing third broods and are not yet on migration. It seems likely that the same applies to House Martins.  Given that one of the Meadow Pipits was a newly fledged bird, showing no sign of post-fledging moult, clearly this is one of the longest breeding seasons we have seen for a while.

Ravensroost Meadows: Wednesday, 5th September 2018

We had a bit of a frustrating session in the meadow at Ravensroost this morning. This time last year we were catching 140 birds, including Swallows and House Martins. This year just 33 birds caught with no Hirundines.  We had a few flying around but nothing like the numbers previously. Here’s hoping that they are all still feeding third broods and delaying their departure that bit longer.  The team was geared up for the higher level of catch with Jonny, Ellie and David joining me for the session. The Wildlife Trust’s latest employee, Emmeline, also came along to see what it is all about.

With just 9 birds before 8:30 and none at all between 8:30 and 10:30.  Whilst we were looking at empty nets, I decided we would pack up if the next round was empty. So, 20 birds later we decided to leave them open for a bit longer. We didn’t catch many more so packed up at 11:30.

One of the birds caught at 10:30 was the first ever Whinchat caught and ringed at the Ravensroost complex.  I have had it confirmed that this is the first ever record of any sort for this species at the site. It was quite a surprise to find it there as it certainly doesn’t seem like typical Whinchat habitat, even on migration.

2018_09_05Whinc2

The list for the day was: Blue Tit 10; Great Tit 2(1); Wren 4; Whinchat 1; Robin 2; Blackcap 8; Whitethroat 2; Chiffchaff 1; Willow Warbler 2.  Totals: 32 birds ringed from 9 species and 1 bird recaptured. Of the birds caught 6 were adults: one each of the Great Tit, Robin and Willow Warbler; the Whinchat and 2 of the Blackcaps.

The Wrens were interesting: two of them were in full juvenile plumage with no indication of their having started their post-juvenile moult. These are quite late for second broods. The first fully juvenile Wrens caught were caught mid-June in the neighbouring Ravensroost Wood.  BTO Bird Facts credits them with having 2 broods per year: from egg laying to fledging is about 5 weeks. Excitingly, doing the maths, it is entirely possible that these youngsters are third brood birds: further investigation required! I have asked the ringing community if they have any hard evidence of third broods in Wrens.

Lower Moor Farm: CES 12, Saturday, 1st September 2018, + Summary

Saturday marked the end of the fourth year of the constant effort site at Lower Moor Farm. The point of the CES scheme is, by putting the nets in the same place, for the same length of time, year on year, standardising the variables, you can trace trends in the bird population at the site, being relatively confident that changes in the population are just that and not down to moving the nets to better positions.

Saturday’s session was quieter than the same session last year, which was a bit unfortunate given that we had a large team out.  Jonny, Ellie, Steph and I were joined by Tim, one of the Wildlife Trust’s Estate Management Team, coming along for a taster session.

The list for the day was as follows: Treecreeper 1; Blue Tit 1; Wren 1(1); Dunnock (3); Robin (5); Blackbird 2; Reed Warbler 2; Blackcap 11(1); Chiffchaff 5(1); Willow Warbler 1; Goldcrest 1; Bullfinch (1).  Totals: 25 birds ringed from 9 species, 12 birds recaptured from 6 species, making 37 birds processed from 12 species.

Over the last four years we have seen a steady reduction in the number of birds caught:

LMF1

The change is mainly due to a significant fall in the number of birds ringed between 2015 and 2016, remaining relatively stable in 2017 but falling away a lot more in 2018.  In 2018, the number of retrapped birds has fallen compared to the previous three years.  The number of species ringed and recaptured have remained relatively constant:

LMF3

The nets are set in the following positions:

Lower Moor rides close up

When I looked further at the data, it is clear that the main issue revolves around one set of nets:

LMF2

Ride 2 has shown a steady reduction in numbers caught over the period.  This ride has been subjected to several management procedures over the last couple of years: thinning of the trees to the side of the path away from the brook, development of scallops, top encourage butterflies on the brook side, and removal of significant amounts of bramble from that area as a result.  It will be interesting to see whether, as these procedures mature, the catch returns to its previous level.  The numbers were falling before these changes were made, however, and the same changes have been made to ride 3, which has not shown such a dramatic, nor continual, reduction.

Somerford Common and Ravensroost Woods: 27th and 29th August 2018

Having missed last Wednesday’s session at Somerford Common, due to rain and wind, Steph, Andrew and I met up there at 5:30 on Monday morning. We set a few lures away, hoping for some migrants coming through. Unfortunately, none of them managed to draw in the target species.  We had a reasonable catch of 35 birds, made up as follows: Blue Tit 6(1); Great Tit 2(1); Coal Tit 2; Long-tailed Tit 1(2); Wren 2; Dunnock 1; Robin 3; Blackcap 5; Chiffchaff 8; Willow Warbler 1. Totals: 31 birds ringed from 10 species; 4 birds recaptured from 3 species, making 35 birds processed from 10 species.  Of the birds caught, 27 were juvenile birds. The adults were 1 each of Coal Tit, Great Tit and Chiffchaff, 2 Long-tailed Tits and 3 Blue Tits.

We have seen an interesting phenomenon recently: catches have been reasonably steady from when we open the nets until 10:00 in the morning, and then it drops off dramatically to virtually zero. Our last four sessions have been the same in this respect so when we arrived at Ravensroost Woods for the August project session we did wonder what would happen.  I was joined by Jonny and Andrew for the session.

We set our nets along the usual rides and started catching straight away. The catch was regular until 8:30 and then dropped off dramatically. We spent the next hour visiting empty nets – and then it got interesting. Firstly, there have been reports of Spotted Flycatcher in the wood for several years now.  We have all seen them.  A family group was seen earlier this week in the vicinity of the meadow pond. However, before today none had been caught. This now means that they have been caught in four of the five woods that we monitor in the Braydon Forest.  We are hopeful that there is a small breeding population in the Forest: a family group has also been seen in the Firs this summer.

2018_08_29sspofl

In addition, we had a decent fall of Chiffchaff in the same net.  They have been a bit scarce over the last couple of years, compared with the previous three years, but numbers seem to be picking up again.

The list for the day was: Nuthatch 3(3); Treecreeper 1; Blue Tit 6; Great Tit 2; Marsh Tit 1; Wren 1; Spotted Flycatcher 1; Robin 4(2); Blackbird (1); Blackcap 11; Chiffchaff 13(2).  Totals: 43 birds ringed from 10 species; 8 birds recaptured from 4 species, making 35 birds processed from 11 species.  Of the birds caught, 37 were definitely fledged this year; 8 were definitely adult and 6 (the Nuthatches) were impossible to age as either fledgling or adult as both undergo a full moult into adult plumage in the summer / early autumn.  This catch compares well with the equivalent session last year (30 birds from 10 species): adding to the trend of matching or bettering the previous year’s catch this late summer / autumn.

As well as the Spotted Flycatcher and the Chiffchaff numbers, it was a relief to catch another Marsh Tit.  Things are moving a bit slowly for this species this year, so we will be focusing our efforts on trying to improve the numbers caught between now and the end of December.

About 10:00 a volunteer team came along to work on the Shooters’ Hut in the middle of the wood. It has been vandalised frequently over the years. They have done a lovely job of repairing it: it looks smashing and it incorporates an owl box.  Let’s hope the vandals leave it alone and the owls don’t!

At 10:30 we were surprised to find a large group of people brandishing pitchforks and scythes come down the main path towards us! Fortunately, our not having recently cobbled together and reanimated a being from parts garnered from various cadavers, they were friendly.  It was a work party come to cut the verges of the path.  I love the fact that the Trust is now able to eschew the tractor and flail mower they used to contract with, to cut back the vegetation along the paths, with the messy and ragged result that used to leave, and have this skilled volunteer workforce to carry out this much better, economic and eco-friendly maintenance.  As they were carrying out their task one of the crew scythed apart a stand of vegetation to reveal what was either a Blackcap or Garden Warbler nest. The key thing about this is that the nest was less than 18″ from the path and a similar distance off the ground. This is why dogs must be kept on leads and not allowed to roam off the path during the breeding season.  These nests are so vulnerable to even the most friendly and well-meaning dog.  (Of course, the Trust rule is that should be the case all year round. Unfortunately, it is regularly ignored by those “responsible” dog owners.)

The catch fell away at 11:30 and we packed up and left site at about 12:30 – leaving the scything crew to carry on their good work.