| 01/10/21 | Willow Warbler | Harwell Laboratory: Rutherford Laboratory | 1 | M Merritt |
| |
| 21/09/21 | Willow Warbler | Chinnor: Cement Works | 2 | J March |
20:04
| In trees at west end of lake 2B. SU751996. |
| 08/09/21 | Willow Warbler | Sarsgrove | 1 | S B Akers |
18:00
| |
| 07/09/21 | Willow Warbler | Muswell Hill nr Piddington | 2 | C W Oram |
11:00
| |
| 06/09/21 | Willow Warbler | Balscote: Balscote Quarry | 1 | M Pidgeon |
14:14
| SP391426. |
| 03/09/21 | Willow Warbler | West Ginge: West Ginge Down | 3 | M Merritt |
| |
| 31/08/21 | Willow Warbler | East Lockinge: Goddard's Barn | 1 | M Merritt |
| SU416864. |
| 28/08/21 | Willow Warbler | Chimney: Chimney Meadows | 3 | M Merritt |
| |
| 28/08/21 | Willow Warbler | Appleford | 2 | J Taylor |
09:43
| m. Two singing from bankside cover along Thames path opposite Church. |
| 23/08/21 | Willow Warbler | Cholsey | 1 | M Fraser-Jones |
10:20
| Passed slowly through the garden singing cheerfully. SU586862. |
| 22/08/21 | Willow Warbler | Waterstock: River Thame | 2 | N Marriner |
08:00
| |
| 14/08/21 | Willow Warbler | Ridgeway Down | 3 | M Merritt |
| SU430846. |
| 11/08/21 | Willow Warbler | East Challow | 1 | M Merritt |
| |
| 10/08/21 | Willow Warbler | Harwell Laboratory: Rutherford Laboratory | 1 | M Merritt |
| Presumed migrant. |
| 09/08/21 | Willow Warbler | Ardley ERF Lagoon | 1 | J Dexter |
20:04
| |
| 27/06/21 | Willow Warbler | Baulking | 4 | M Merritt |
| Singing males. |
| 24/06/21 | Willow Warbler | Burnt Platt Wood | 1 | J Taylor |
17:06
| SU6893. |
| 11/06/21 | Willow Warbler | Scutchamer Knob | 1 | M Merritt |
| |
| 01/06/21 | Willow Warbler | Warburg Reserve | 2 | A Stow |
19:15
| |
| 29/05/21 | Willow Warbler | Standlake | 1 | M Cunningham |
16:54
| Hunts corner ponds. I find this uncommon as a breeder locally. |
| 29/05/21 | Willow Warbler | Burnt Platt Wood | 2 | J Taylor |
10:20
| SU6983. |
| 28/05/21 | Willow Warbler | Nuneham Courtenay: Nuneham Courtenay Arboretum | 2 | A Cheke |
18:42
| singing. 1 in main arboretum, 1 in new added woodland. |
| 19/05/21 | Willow Warbler | Letcombe Bassett: Gramps Hill | 2 | M Merritt |
| singing male. |
| 16/05/21 | Willow Warbler | Baulking | 6 | M Merritt |
| Singing males. |
| 01/05/21 | Willow Warbler | South Leigh | 3 | M Cunningham |
17:09
| |
| 29/04/21 | Willow Warbler | Stratfield Brake | 2 | J Coppock |
23:48
| |
| 28/04/21 | Willow Warbler | Wantage Sewage Treatment Works | 1 | M Merritt |
| SU401913. |
| 27/04/21 | Willow Warbler | Neal's Shaw | 1 | J Taylor |
18:03
| SU6882. |
| 22/04/21 | Willow Warbler | Woodeaton | 1 | N Boyd |
06:00
 | An aberrant "song-switching" singer with chiffchaff and willow warbler phrases, always starting with a very distinctive intro motif, sometimes very reminiscent of pied flycatcher song. https://www.xeno-canto.org/641560 https://www.xeno-canto.org/641559
Looked and otherwise behaved like a normal willow warbler.
. SP527121. |
| 21/04/21 | Willow Warbler | Fyfield Wick | 1 | J Cleeter |
06:45
| male. Singing. |
| 20/04/21 | Willow Warbler | Milton Hill House | 1 | J Cleeter |
10:00
| male. Singing. |
| 19/04/21 | Willow Warbler | Moreton nr Thame: Moreton Golf Course | 10 | L Marriner |
21:20
| |
| 19/04/21 | Willow Warbler | Cholsey: Honey Lane | 1 | M Fraser-Jones |
09:00
| Short burst of song. SU587863. |
| 19/04/21 | Willow Warbler | Ardington: Christopher's Wood | 4 | M Merritt |
| Singing males. SU423882. |
| 18/04/21 | Willow Warbler | Eynsham Wood | 1 | J P Bishop |
10:15
| SP423102. |
| 17/04/21 | Willow Warbler | Garsington | 1 | S P Lockey |
09:52
| In a Birch - front garden. |
| 16/04/21 | Willow Warbler | Moreton nr Thame: Moreton Golf Course | 2 | L Marriner |
20:46
| Singing. |
| 14/04/21 | Willow Warbler | Otmoor | 21 | I West |
07:00
| |
| 14/04/21 | Willow Warbler | Crog Hill | 1 | M Merritt |
| |
| 14/04/21 | Willow Warbler | Woolstone Down | 1 | M Merritt |
| |
| 13/04/21 | Willow Warbler | Oxford: Aston's Eyot | 1 | B Pomfret |
| singing. |
| 12/04/21 | Willow Warbler | Didcot: Moor Ditch | 1 | M Violette |
19:30
| SU531929. |
| 12/04/21 | Willow Warbler | Blenheim: Park Farm | 5 | B Pomfret |
| singing at various spots around lake. |
| 11/04/21 | Willow Warbler | Newington | 1 | M P Mckeown |
16:00
| On Webs count. |
| 11/04/21 | Willow Warbler | Moreton nr Thame: Moreton Golf Course | 4 | L Marriner |
20:22
| |
| 11/04/21 | Willow Warbler | Waterstock: River Thame | 4 | N Marriner |
10:00
| |
| 10/04/21 | Willow Warbler | Otmoor | 26 | I West |
06:30
| |
| 10/04/21 | Willow Warbler | Sonning Eye GPs | 1 | M F Walford |
14:06
| Singing. |
| 08/04/21 | Willow Warbler | West Challow | 1 | M Merritt |
| SU361882. |
| 09/04/21 | Willow Warbler | Moreton nr Thame: Moreton Golf Course | 6 | L Marriner |
21:04
| 4 new birds in today. |
| 09/04/21 | Willow Warbler | Chinnor | 1 | D Stracey |
11:00
| 1 singing along the Ridgeway. SU775997. |
| 09/04/21 | Willow Warbler | Lambridge Woods | 1 | N Verge |
15:00
| Visiting garden pond, not 100% sure of ID, but definitely a warbler. SU738843. |
| 09/04/21 | Willow Warbler | Bletchingdon | 1 | D Watkinson |
08:00
| Singing. FOY. SP508175. |
| 08/04/21 | Willow Warbler | Otmoor | 8 | I West |
06:30
| |
| 08/04/21 | Willow Warbler | Chipping Norton | 1 | S B Akers |
11:00
| First record of the year - heard only. SP283268. |
| 07/04/21 | Willow Warbler | Moreton nr Thame: Moreton Golf Course | 1 | L Marriner |
21:27
| NFY on site. |
| 07/04/21 | Willow Warbler | Blenheim | 2 | D A Doherty |
21:00
| |
| 06/04/21 | Willow Warbler | Blenheim | 1 | D A Doherty |
22:15
| |
| 03/04/21 | Willow Warbler | Otmoor | 9 | I West |
07:00
| |
| 05/04/21 | Willow Warbler | Sonning Eye GPs | 2 | R C Watts |
14:01
| |
| 05/04/21 | Willow Warbler | Chimney: Chimney Meadows | 2 | M Merritt |
| |
| 04/04/21 | Willow Warbler | Chimney: Chimney Meadows | 1 | M Violette |
12:00
| |
| 04/04/21 | Willow Warbler | Sarsgrove | 1 | S B Akers |
09:30
| First of the year here. |
| 04/04/21 | Willow Warbler | Iffley: Iffley Meadows | 1 | S Roby |
10:02
| m. |
| 02/04/21 | Willow Warbler | West Challow | 1 | M Merritt |
| m. SU361882. |
| 01/04/21 | Willow Warbler | Grimsbury Reservoir | 1 | G Blockley |
| |
| 01/04/21 | Willow Warbler | Otmoor | 4 | I West |
06:30
| |
| 31/03/21 | Willow Warbler | Port Meadow | 3 | A Hartley |
| male. Burgess Field, per Nick Boyd. |
| 31/03/21 | Willow Warbler | Otmoor | 1 | I West |
19:00
| |
| 31/03/21 | Willow Warbler | Otmoor | 1 | M Merritt |
| Singing male. |
| 31/03/21 | Willow Warbler | Standlake | 1 | M Cunningham |
10:11
| At S end Langley lane. Feeding and occasionally singing. |
| 30/03/21 | Willow Warbler | Otmoor | 2 | I West |
07:00
| |
| 30/03/21 | Willow Warbler | Farmoor village | 1 | P Butler |
20:55
| as you come from meadow close to pink hill. |
| 30/03/21 | Willow Warbler | River Thames: nr Sandford-on-Thames | 1 | D Moden |
15:40
| In song. |
| 29/03/21 | Willow Warbler | Rushy Common | 1 | R W Catling |
18:30
| |