| 28/12/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 3 | R F Milligan |
11:25
| Ads, at the main lake. Please only view from the public footpath. |
| 21/12/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | R Marsh |
| |
| 12/12/17 | Lesser Black-backed Gull | Colebrook Lake, Moor Green Lakes | 90 | R Murfitt |
16:10
| At least at roost. |
| 01/12/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | R Marsh |
| |
| 29/11/17 | Lesser Black-backed Gull | Colebrook Lake, Moor Green Lakes | 150 | J M Clark |
16:15
| approx number at roost on Colebrook North. |
| 13/11/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 1 | R F Milligan |
11:25
| Ad, sand island, main lake. Please only view from the public footpath. |
| 11/11/17 | Lesser Black-backed Gull | Colebrook Lake, Moor Green Lakes | 90 | R Murfitt |
16:30
| At least at roost (still arriving). |
| 08/11/17 | Lesser Black-backed Gull | Lower Farm GP | 2500 | G Stewart |
16:15
| At Least 2500 could have been more along with many Black headed gulls. |
| 03/11/17 | Lesser Black-backed Gull | Moor Green Lakes | 3 | R F Milligan |
10:42
| Ads, CLN. |
| 01/11/17 | Lesser Black-backed Gull | Moor Green Lakes | 3 | R F Milligan |
10:42
| Ads, CLN. |
| 22/10/17 | Lesser Black-backed Gull | Lower Farm GP | 570 | P E Hutchins |
| Present by late afternoon. |
| 26/09/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | R Marsh |
10:21
| |
| 19/09/17 | Lesser Black-backed Gull | Main Pit, Theale GPs | 3600 | R Crawford |
19:20
| To roost. |
| 20/08/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 23 | M Hunt |
15:10
| Adults. Please only view from the public footpath. |
| 16/08/17 | Lesser Black-backed Gull | Black Swan Lake, Dinton Pastures CP | 1 | R Marsh |
| imm. |
| 14/08/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 6 | R F Milligan |
11:35
| Ads, small gravel island, main lake. Please only view from the public footpath. |
| 10/08/17 | Lesser Black-backed Gull | Lea Farm Lake | 3 | R Marsh |
08:45
| ad. |
| 31/07/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 1 | M Hunt |
11:45
| Please only view from the public footpath. |
| 30/07/17 | Lesser Black-backed Gull | Emmbrook | 1 | P O'Neill |
17:00
| ad. Heading SE along Emm Brook over Old Forest Road. |
| 30/07/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | R Marsh |
| |
| 24/07/17 | Lesser Black-backed Gull | Reading | 3 | R Dryden |
| 2ad 1 juv. A pair has again successfully nested on the chimney of a Victorian house in East Reading. SU735728. |
| 05/07/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | P O'Neill |
16:30
| |
| 28/06/17 | Lesser Black-backed Gull | Black Swan Lake, Dinton Pastures CP | 1 | P O'Neill |
09:00
| ad. |
| 26/06/17 | Lesser Black-backed Gull | Lea Farm Lake | 2 | R Marsh |
| |
| 24/06/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | R Marsh |
| |
| 20/06/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | P O'Neill |
08:30
| ad. In SW corner but driven off by persistent BH Gulls. |
| 16/06/17 | Lesser Black-backed Gull | Lea Farm Lake | 1 | P O'Neill |
08:30
| ad. |
| 29/05/17 | Lesser Black-backed Gull | Emmbrook | 1 | P O'Neill |
18:30
| ad. Patrolling the outfield of Emmbrook and Bearwood cricket pitch. |
| 25/05/17 | Lesser Black-backed Gull | Lea Farm Lake | 2 | R Marsh |
| |
| 18/05/17 | Lesser Black-backed Gull | Lower Farm GP | | N Cleere |
| 100+ and 10+ Herring Gull. Unusual to have so many large gulls at site at this time of year. |
| 03/05/17 | Lesser Black-backed Gull | Sandford Lake, Dinton Pastures CP | 2 | P Bright-Thomas |
09:00
| ad. Two on lake for 20+ minutes. |
| 17/04/17 | Lesser Black-backed Gull | Lea Farm Lake | 2 | R Marsh |
| |
| 12/04/17 | Lesser Black-backed Gull | Lea Farm Lake | 2 | R Marsh |
11:30
| |
| 10/04/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 1 | R F Milligan |
10:55
| A, asleep on a sand island, main lake. Please only view from the public footpath. |
| 08/04/17 | Lesser Black-backed Gull | Lea Farm Lake | 3 | R Marsh |
09:15
| |
| 05/04/17 | Lesser Black-backed Gull | Lea Farm Lake | 2 | R Marsh |
| |
| 17/03/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 3 | R F Milligan |
11:20
| AW, main lake. Please only view from the public footpath. |
| 13/03/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 1 | R F Milligan |
10:55
| AW, main lake. Please only view from the public footpath. |
| 08/03/17 | Lesser Black-backed Gull | Colebrook Lake, Moor Green Lakes | 30 | J M Clark |
17:45
| |
| 18/02/17 | Lesser Black-backed Gull | Lea Farm Lake | 3 | R Marsh |
08:30
| |
| 17/02/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 3 | R F Milligan |
10:22
| AW, main lake. Please only view from the public footpath. |
| 13/02/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 4 | M Hunt |
13:10
| Please only view from the public footpath. |
| 11/02/17 | Lesser Black-backed Gull | Purley on Thames, Reading | 2 | M J Smith |
| Mapledurham Lock on Thames bank, Oxon side. |
| 09/02/17 | Lesser Black-backed Gull | Lea Farm Lake | 2 | R Marsh |
| |
| 07/02/17 | Lesser Black-backed Gull | Lower Farm GP | | N Cleere |
| 3000+. |
| 18/01/17 | Lesser Black-backed Gull | Grove Lake, Moor Green Lakes | 50 | J M Clark |
16:15
| at roost. |
| 16/01/17 | Lesser Black-backed Gull | Purley on Thames, Reading | 3 | M J Smith |
| at Mapledurham Lock with probable Caspian Gull. |
| 11/01/17 | Lesser Black-backed Gull | Lower Farm GP | | N Cleere |
| 3,000 - 4,000. |
| 09/01/17 | Lesser Black-backed Gull | New workings, Moor Green Lakes | 1 | R F Milligan |
10:47
| AW, Main Lake. Please only view from the public footpath. |
| 07/01/17 | Lesser Black-backed Gull | Lea Farm Lake | 3 | R Marsh |
| |
| 03/01/17 | Lesser Black-backed Gull | Lea Farm Lake | 2 | R Marsh |
13:00
| |