Dutch Bird Alerts
| 29 september 2022 | ||
| 11:41 | NH | Pectoral Sandpiper |
| 10:35 | FR | Barred Warbler |
| 10:15 | NH | Red-flanked Bluetail |
| 09:35 | FR | Red-breasted Flycatcher |
| 09:05 | NH | Olive-backed Pipit |
| 28 september 2022 | ||
| 12:20 | NH | Red-flanked Bluetail |
| 11:13 | FR | Barred Warbler |
| 26 september 2022 | ||
| 19:22 | ZL | soft-plumaged petrel |
| 13:46 | NH | Sabine's Gull |
| 25 september 2022 | ||
| 16:04 | FR | Olive-backed Pipit |
| 14:27 | FR | Olive-backed Pipit |
| 14:25 | FR | Arctic Warbler |
| 14:24 | GR | Barred Warbler |
| 13:50 | NH | Olive-backed Pipit |
| 13:23 | ZL | Western / Eastern Bonelli's Warbler |
| 11:00 | NH | Pectoral Sandpiper |
| 10:02 | FL | Pectoral Sandpiper |
| 09:00 | FR | Olive-backed Pipit |
| 08:58 | ZH | Blyth's Reed Warbler |
| 08:50 | ZH | Red-flanked Bluetail |
| 08:43 | NH | Red-flanked Bluetail |
| 08:07 | NH | Olive-backed Pipit |
| 08:02 | GE | Black-winged Kite |
| 07:57 | NH | Olive-backed Pipit |
| 24 september 2022 | ||
| 18:16 | FR | Olive-backed Pipit |
| 15:23 | FR | Olive-backed Pipit |
| 14:18 | ZH | Olive-backed Pipit |
| 13:51 | NH | Pectoral Sandpiper |
| 13:40 | NH | Olive-backed Pipit |
| 11:36 | NH | Red-flanked Bluetail |
Siberische Boompieper
Anthus hodgsoni · Olive-backed Pipit
Datum & Tijd
25-09-2022 07:57
Locatie
| Atlasblok | NH · 04-54-53 |
|---|---|
| GPS | 53.16226 4.82382 |
| RD | 117.318 575.208 |
| De Krim De Slufter Eierlandsche duinen |
Tijd & Gedrag
Onbekend
Zekerheid
Determinatie zeker, geen kleedgegevens
Gehoord via
waarneming.nl
Extra informatie
1 ex. roepend
Overvliegend naar noord, alleen gehoord, niet gezien. Geluidsopname van 3 bruikbare roepjes voor analyse aan de hand van Martin 2013. https://avesrares.wordpress.com/2013/09/27/identification-of-olive-backed-and-tree-pipit-by-call/
Maximale frequentie 8,3 kHz (eerste roep). Gemiddelde waardes van de 3 roepjes: MSF 7,67 kHz; gradient 12,3; parameter 1: 94; tijdsduur van 1 modulatie 9,45 ms; parameter 2: 885. Opvallend is het lage aantal modulaties, past beter bij Siberische boompieper (10-15) dan bij boompieper (15-25).
Waargenomen door:
Job ten Horn