Friday, 17 August 2018

Marsworth CES 10 - 13th August 2018 - Willow Warblers passing through

CES nets 560'
1st half: Damp, cloudy, calm. 2nd half: Showers, broken cloud, light breeze.
LL, CMS



Adults
Juveniles
Total
Blackcap
1
11
12
Chiffchaff

10
10
Reed Warbler
1
18
19
Sedge Warbler
1
1
2
Willow Warbler
2
10
12
Blue Tit
2
1
3
Great Tit
1

1
Dunnock

1
1
Wren

3
3
Robin

4
4
Cetti’s Warbler
1
3
4
Treecreeper

1
1
Goldcrest

1
1
Long Tailed Tit
1
2
3

10
66
76


Hooray!! first time this year we have an above average catch. Claire and I managed to get CES 10 done on Monday as the weather forecast for Sunday had been heavy rain and wind (which did not materialise as it happens). GK helped put up nets before disappearing off to beat the London rush-hour.

We were kept reasonably busy with a steady stream of Blackcaps and Reed Warblers and a nice number of Willow Warblers. Two adult Willow Warblers amongst the yellow juveniles had completed moult and were in fresh plumage. A brood of Cetti's Warblers were in the area of Net 7, a juvenile female and two males by their size with an adult female that did not seem to have started moult. The adult female was a retrap, originally ringed as a juvenile in September 2016 and this is the first time she has been caught since Nov 2016.

The two Sedge Warblers were carrying fat and probably passing though. We caught our first juvenile Dunnock and Goldcrest of the year. There was a heavy rain shower for about 15 minutes at 10:30 and dispite our hopes that this might cause a Redstart or a Spotted Flycatcher or two to drop in, we caught very little after that as the sun came out and the breeze picked up.

Tawny Owl, Jay, Green Woodpecker and Hobby were all heard.

Lynne


Wendover CES 10 - 7th August 2018


 560ft nets (standard CES pattern), 
nets open from 04:50 to 10:50.
Calm, dry, mostly clear sky.


Species
Total
New Bird
Retrap
Blackbird
10
8 (8 x 3J)
2
Blackcap
4
3 (3 x 3J)
1 (1 x 3J)
Bullfinch
3
3 (2 x 3J)

Dunnock
2
1
1 (1 x 3J)
Great Tit
1
1 (1 x 3J)

Robin
4
2 (2 x 3J)
2 (1 x 3J)
Whitethroat
1
1 (1 x 3J)

Total
25
1
2

A below average catch for CES#10 (mean 39).   What looks like a new brood of Blackbirds has swelled their total to 41 individuals in 2018.  Robins are at 50 and Blackcaps 33.  The late dribble of Whitethroat continues.

Ringers Adam, Ginny & Pete

Wednesday, 8 August 2018

Marsworth CES 9 - two attempts


After 5 weeks of drought we finally had some rain - great except that CES 9 was due and going back to work has limited the choice of days for ringing. We attempted to get it done on the Saturday 28th July and I was grateful for Claire, Chris and Ed being willing to give it a go with little prospect of success. Carrying umbrellas and wearing waterproofs to wade through the chest-high wet vegetation we started putting nets up at 4:30am and it started to rain a little at 5:30am. Then began a long morning of opening and closing nets as the showers kept passing through.  The nets were sheltered from the SW wind by the belt of poplars that runs behind the reed bed and conditions where we sit were actually far worse than by the nets, with the wind making the trees rustle and drip. We decided to close Net 1 at 9:30am because it was starting to catch the wind but other than that we had the nets open for roughly four hours instead of our usual six and caught 36 birds. The birds were mainly Reed Warblers and Blackcaps, the Blackcaps were all 3J but the 16 Reed Warblers included 7 adults including a female with BP4 that had been ringed in 2015 and three other females with BP5.
We checked the large nest box and found an adult Stock Dove on two warm eggs plus two large ringable chicks from her previous brood still in the box.
The following Sunday, 5th August should have been CES 10. The weather had returned to hot and dry and a Hobby was hunting over the reed bed against a rosy sunrise as we put up nets. Catching was very slow at the start but then some migrants started passing through including a little group of Chiffchaff and Willow Warblers. We caught numerous Migrant Hawker dragonflies in the nets - all released unharmed. The total of 44 at the end was surprisingly not much higher that the previous week and we continue to be well below average.
Our total for sessions 1 - 9 is 366 which is the lowest since 1994 (range is 335 - 672).
It remains to be seen which of the two sessions the BTO will prefer to use as the CES 9, assuming we manage to get another session in next weekend to use as CES10.


28th July
Wind and rain
5th Aug
Calm and very hot
Blackcap
8
4
Chiffchaff
1
12
Reed Warbler
16
7
Willow Warbler

2
Blue Tit

5
Great Tit

1
Bullfinch
3
1
Wren
6
11
Robin
1
1
Blackbird
1


36
44

Lynne

Tuesday, 7 August 2018

Wendover CES 10 - 7th August 2018


7 August 2018, 
560ft nets (standard CES pattern), 
nets open from 04:34 to 10:34
Calm, dry, mostly clear sky.

Species
Total
New Bird
Retrap
Blackbird
4
2 (3J = 2)
2
Blackcap
5
4 (3J = 3)
1 (3J = 1)
Blue Tit
1
1 (3J = 1)

Bullfinch
3
1 (3J = 1)
2
Chiffchaff
2
1 (3J = 1)
1 (3J = 1)
Dunnock
1
1 (3J = 1)

Garden Warbler
2
2 (3J = 2)

Great Tit
3
3 (3J = 3)

Long-tailed Tit
1
1 (3J = 1)

Robin
5
1 (3J = 1)
4 (3J = 4)
Song Thrush
4
4 (3J = 3)

Whitethroat
4
4 (3J = 4)

Total
35
25
10

A below average catch for CES#10 (mean 46) but made up for by 2 x GARWA (our first since 2015) and 4 nice juvenile WHITE (our first for 2018).  We have seen juvenile WHITE first appear as early as the 1st week of June (2005) and as late as the 3rd week of August (2013).  No June appearances have occurred since 2011.  The annual numbers of that species captured since 2011 have fallen noticeably and that trend looks set to continue.  A single LOTTI was surprisingly the first for this year.
Mike did well to successfully extract a Black-tailed skimmer from Net 5 and also a large Bumblebee species from Net 1 – only to get a stung finger for his trouble.

Ringers Mike, Ginny & Pete