An English text, since i don't want to translate everything
We've all noticed the sudden appearence of four or five ferruginous ducks (
Aythya nyroca) in Brussels. Ducks are often directly suspected of being escaped from a waterfowl collection. It is true that especially ducks are very often held in captivity and that they often tend to escape. What we often seem to forget is that ducks are excellent flyers and swimmers who can reach large distances without making use of e.g. ships. Below i've made a list of pro's and contra's of the likelihood that the 'invasion of fudge ducks' consists of wild animals or not.
Contra:
- Ferruginous ducks are often held in waterfowl collections. I don't have any scientific data on how much, let alone how much they escape. It is a fact that when I see a waterfowl collection, fudge ducks are often present
- No Easterly winds (that could have driven them)
- (Edit:) Most individuals were not shy and they often ate from the bread that was thrown in the water ("zakken voor de broodtest" as the Dutch say
)
Pro:
- small invasion also noticable in the rest of the Benelux. Here a list of observations since the last period of snow a few weeks back: The Netherlands: 6 individuals only in the southern and middle part of the country: de Grave (NB), Alphen aan de Rijn (ZH), Kerkrade (LI), Haaksbergerveen (OV), Wilp (GE) and Barendrecht (ZH). Begium: Apart from the Brussels brids we have the longstayers in Harelbeke (WV) en Sas Bossuit (HA), furthermore we have new arrivals in Waasmunster (OV), Marais d'Harchies (HA), Stappersven (AN) and Grensmaas (LI). Source: waarneming.nl and waarnemingen.be.
- All unringed individuals.
I wonder what your opinion is on these observations. Please do not hesitate to give more pro's and contra's! In the end we can all decide for ourselves wether we want these ducks on our lists or not
Just for the overview: the ducks have been seen on the following sites: Rouge cloitre/Rood Klooster (vijver diep in het bos), Parc Malou, Parc Woluwe, Jardins Sobieski and maybe the same individual elsewhere in Laken/Laeken.
Regards,
Daan