Effectiveness of wildlife warning reflectors in reducing deer vehicle collisions: a behavioral study

  • Published source details Ujvári M., Baagøe H.J. & Madsen A.B. (1998) Effectiveness of wildlife warning reflectors in reducing deer vehicle collisions: a behavioral study. Journal of Wildlife Management, 62, 1094-1099.


This study is summarised as evidence for the following.

Action Category

Install wildlife warning reflectors along roads

Action Link
Terrestrial Mammal Conservation
  1. Install wildlife warning reflectors along roads

    A study in 1996 in a forest in Zealand, Denmark (Ujvári et al. 1998) found that fallow deer Dama dama initially responded to wildlife reflectors with alarm and flight but became habituated to the light reflection. On the first night, using a low level of lighting, deer fled from the reflection in 99% of cases. On night five, using the same light level, only 16% fled and 74% did not react. On nights 6–7 with four light levels, 86–94% fled. However, on nights 16–17 only 30–37% fled and 38–48% showed no response. Following a one-night break, deer fled almost twice as much as they did the night before the break (35–90% vs 20–54%). Feeding deer were exposed to light reflections (WEGU reflector; two sloping mirrors within a cover) at predetermined time intervals and their behavioural responses were recorded. Data were collected over 17 nights (two with no lighting used) in April 1996. Only the lowest light level was used on the first five nights. Subsequently, four levels were used.

    (Summarised by: Rebecca K. Smith)

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