Monday, 28 August 2017

27/08 Thatcham Marsh LNR CES 2017.12

Location: Thatcham Marsh LNR CES visit 17.12
Session: 27-Aug-2017 05:30 to 10:30hrs
Headlines: The last CES visit of the year. A noticeable difference to 2016's visit 12 is fewer Reed Warblers and Chiffchaffs this year. A capture of 32 is a little below the average of 33 for visit 12; range 2006-11 1995-71. The total capture for the season is 405, below the average  of 475 for the 25 years of this CES ; range 2014-337 1995-769. Diversity is down, 18 species captured over the season; range 2006-17 1995-27
The totals for our target species are as follows:
Reed Warbler 171, the average is 209 range 2008-127 1995-302
Sedge Warbler 49, the average is 97 range 2016-47 1995-215
Cetti’s Warbler 24, the average is 17 range 1993-0 2014-34 This species has been steadily increasing since it first bred in 1994 and peaked in 2014 but numbers show a decline since. It has been an interesting 25th season and not as bad as it might have seemed, wonder what next year will bring. A decent spring and summer with less rain would be good. 
Weather: bright, sunny, calm, hot
Present: JL, IW, JHW, EMH,JPM
Nets: 198metres on one reed bed standard net ride up from 06:15 to 10:10hrs; no additional nets
Lure (none): 
Capture (New/Recapture)
32(21/11)
36(28/8)CES visit 2016.12 (27/08/2016)
Species
New
Rtp
Juvs
Adults
BLACA
3

3

BLUTI
1
2
2
1
CETWA
3
3
2
4Indeterminate
CHIFF
1

1

DUNNO
1

1

GARWA
1

1

REEBU
1


1
REEWA
6

6

ROBIN
1


1
SEDWA
1

1

WHITE
1

1

WREN
1
6
7

Species
New
Rtp
Juvs
Adults
BLACA
1

1

BLUTI
3
1
1
3
CETWA
2
3
4
1
CHIFF
8

8

REEWA
10

10

WHITE
1

1

WREN
3
4
7


Recaptures: 11, all recent except: Cetti’s Warbler 1y 139d, and 350d Blue Tit 5y 315d
Nice to capture a Sedge Warbler today, perhaps the last of the year
Sightings 43 Species: Ian's list is quite busy today. Water Rails were very noisy, probably juveniles being kick out. A calling Marsh Tit again also Garden Warbler, a hard to find species now they have stopped singing. A couple of Swifts over; most have long gone south. 


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