| Titre : | Birds killed on roads in Southern Jutland, Denmark, 2001-2008 |
| Auteurs : | Johannes Erritzoe, Auteur ; Helga Erritzoe, Auteur ; Marius Norgaard, Auteur |
| Type de document : | Article |
| Dans : | Dansk Ornitologisk Forenings Tidsskrift (112(4) 2018) |
| Article en page(s) : | 125-138 |
| Résumé : | Seven and a half years of monitoring bird traffic casualties by walking and cycling an accumulated 14 750 km of road in a small village and surrounding arable land in the south of Jutland produced a total of 612 roadkilled birds belonging to 42 species. The black spots in our study were houses with gardens situated on both sides of the roads. There were more males than females of the two most frequently killed species, House Sparrow Passer domesticus and Eurasian Blackbird Turdus merula, with the difference more pronounced in Blackbird. Whereas juvenile House Sparrows were in the majority among the roadkill, the opposite was the case for Blackbird, reflecting the different post-fledging behaviour of the two species. During the study period, a 50% decline in recorded roadkill was noted. Compared with another study conducted on Lolland-Falster in southern Denmark between 1957 and 1981, we found about 76% fewer birds per unit of road. Among potential reasons for the decline, we suggest the most likely to be decreasing bird populations, increased predator populations continuously 'cleaning' the roads, and birds learning to avoid vehicles. Our numbers of roadkill differ to some degree from studies in other countries, supporting the possibility that some populations (e.g. corvids and swallows) have learned to be more cautious of moving cars than others or that even natural selection may have been at work. |
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