Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Port Barbe, La Chapelle-sur-Erdre (Loire-Atlantique, 44) | 1 November | Port Barbe, La Chapelle-sur-Erdre (Loire-Atlantique, 44) | 5 November | |||||
| 2018 | Port Barbe, La Chapelle-sur-Erdre (Loire-Atlantique, 44) | 28 October | Port Barbe, La Chapelle-sur-Erdre (Loire-Atlantique, 44) | 28 October | |||||
| 2017 | Port Barbe, La Chapelle-sur-Erdre (Loire-Atlantique, 44) | 7 October | Port Barbe, La Chapelle-sur-Erdre (Loire-Atlantique, 44) | 7 October |
