16/07 Thatcham Marsh LNR

Location: Thatcham Marsh LNR CES visit 17.08
Session: 16-Jul-2017 05:30 to 11:00hrs

Headlines: A good session by this year’s standards. The reed bed although quiet produced a good capture of Reed Warbler, mostly juveniles but only one adult retrap Sedge Warbler. Two juvenile Garden Warblers was good considering we did not have any scrub nets up. The session started by us having to remove a 4 metre length of timber that someone had used to gain access to the reed bed ride. We get this occasionally; I think people think they will find a pot of gold or similar at the end of the ride. 48 in the standard nets is above the average of 44 for visit 08; range: 2012-24, 1997-89. One Sedge Warbler is disappointing but in 2005 none were captured. 22 Reed Warbler is above the average of 20 for this visit; range 2016-8, 2000-33. A good capture of Wrens; this was once a good site for them particularly in winter when good numbers once moved in late autumn to winter. In the early days they were intensively ringed but we never did get any recoveries that gave a clue as to where they spent the rest of the year except perhaps locally. It was heavy going in the heat and humidity of the reed bed, mowing the ride after nets down.

Weather: overcast, warm, light breeze early, cleared to sunny periods, breezy later.
Present: JL, IW, DL, JPM, RGS, RDW
Nets: 198M standard net ride on the reed bed, up from 06:15 to10:15hrs no additional nets
Lure (none): 
Capture (New/Recapture)

48(41/07)	30(24/06) visit16.08  16/07/2017
Species New Retrap     Juv Adult BLACA 4 3 1 CETWA 3 2 1 CHIFF 2 2 DUNNO 3 3 GARWA 2 2 GRETI 1 1 REEWA 16 6 15 7 ROBIN 2 2 SEDWA 1 1 WREN 8 7 1	Species New Retrap     Juv Adult BLACA 1 1 CETWA 3 1 3 1 CHIFF 5 4 1 REEWA 6 3 7 2 SEDWA 3 3 WREN 7 1 7 1

Recaptures: (7) Reed Warbler 1y 63d, 1y 42dx3 Sedge Warbler 98d, others recent

Sightings 40 Species: IW’s bird list, nothing of particular note; swift numbers are dropping as you would expect for the time of year.