| 18/09/21 | Great Crested Grebe | Hosehill Lake, Theale GPs | 7 | S A Graham |
09:00
| 6 ad + f/w. |
| 11/09/21 | Great Crested Grebe | Bottom Lane GP (W), Theale GPs | 4 | S A Graham |
09:00
| 3 ad + f/w. Single unfledged young. |
| 06/09/21 | Great Crested Grebe | Woolhampton | 7 | S K Proddow |
11:30
| |
| 06/09/21 | Great Crested Grebe | Main Pit, Theale GPs | 6 | S K Proddow |
10:00
| |
| 06/09/21 | Great Crested Grebe | Hosehill Lake, Theale GPs | 4 | S K Proddow |
09:45
| |
| 05/09/21 | Great Crested Grebe | Streatley | 1 | N J Bucknell |
10:20
| on Thames north of village. |
| 01/09/21 | Great Crested Grebe | Lower Farm GP | 2 | G Stewart |
15:30
| 2 Adults with 4 Juveniles. |
| 30/08/21 | Great Crested Grebe | Streatley Hill | 1 | N J Bucknell |
12:30
| on Thames north of village. Until the last two years not a noteworthy record, but this is thhe first since April. |
| 26/08/21 | Great Crested Grebe | Colebrook Lake, Moor Green Lakes | 10 | J M Clark |
06:15
| and brood of 2 med/lg yg. |
| 25/08/21 | Great Crested Grebe | Lower Farm GP | 2 | G Stewart |
16:30
| Two Adults with four Juveniles. |