For the article Measurement of relative bill length of Black-tailed Godwits from photographs by Jan Bisschop (Dutch Birding 43 (2): 113-119, 2021), a large number of photographs on the internet has been analysed. A list of the links can be downloaded here.
Dutch Bird Alerts
25 april 2024 | ||
16:53 | GR | Lachstern |
14:10 | ZL | Grote Grijze Snip |
24 april 2024 | ||
15:41 | FR | Amerikaanse Wintertaling |
09:03 | NB | Iberische Tjiftjaf |
23 april 2024 | ||
13:31 | FR | Alpenheggenmus |
09:23 | ZL | Amerikaanse Wintertaling |
09:10 | NH | Dwerggors |
22 april 2024 | ||
10:16 | NH | Dwerggors |
21 april 2024 | ||
15:54 | FR | Amerikaanse Wintertaling |
14:42 | UT | Kleine Topper |
11:05 | LI | Iberische Tjiftjaf |
11:00 | NH | Dwerggors |
10:33 | ZL | Amerikaanse Wintertaling |
10:02 | GE | Ringsnaveleend |
09:27 | ZL | Amerikaanse Wintertaling |
08:23 | NH | Amerikaanse Wintertaling |
20 april 2024 | ||
17:36 | ZL | Amerikaanse Wintertaling |
13:19 | LI | Iberische Tjiftjaf |
10:33 | ZL | Amerikaanse Wintertaling |
08:58 | GE | Ringsnaveleend |
07:22 | NH | Dwerggors |
19 april 2024 | ||
18:42 | GE | Ringsnaveleend |
16:32 | ZL | Amerikaanse Wintertaling |
15:41 | ZL | Amerikaanse Wintertaling |
18 april 2024 | ||
20:37 | ZL | Amerikaanse Wintertaling |
12:30 | ZL | Amerikaanse Wintertaling |
10:21 | GE | Ringsnaveleend |
17 april 2024 | ||
18:34 | GE | Ringsnaveleend |
16:06 | ZL | Grote Grijze Snip |
15:55 | ZL | Amerikaanse Wintertaling |