Study

Rate of bird collision with power lines: effects of conductor-marking and static wire-marking

  • Published source details Janss G.F.E. & Ferrer M. (1998) Rate of bird collision with power lines: effects of conductor-marking and static wire-marking. Journal of Field Ornithology, 69, 8-17.

Actions

This study is summarised as evidence for the following.

Action Category

Mark power lines to reduce incidental bird mortality

Action Link
Bird Conservation
  1. Mark power lines to reduce incidental bird mortality

    A controlled before-and-after study of three different markers at three sites in Spain in 1991-5 (Janss & Ferrer 1998) found that markers differed in their effects. In grassland and arable land in Badajoz, collision mortality across all species was 81% lower following the installation of white plastic spirals (expected mortality of 47 birds, actual mortality of nine). In mixed cattle grazing and cereal cropland in Cáceres, the total number of collisions (72) remained constant following the installation of neoprene strips, but there was a 76% reduction in collision mortality when great bustards Otis tarda were excluded from the analysis. In a wetland in Huelva there was no difference in collision mortality after the installation of black plastic strips (6 collisions in marked vs. 12 in unmarked spans). Plastic spirals were 1m long, 30 cm maximum diameter and placed every 10 m on static wires, staggered to give the appearance of a 5 m placement. Neoprene bands were crossed black strips, 35 x 5 cm with a 5 x 4 cm phosphorescent stripe, installed every 20 m on conductor wires and staggered to give the appearance of a 10 m placement. Black plastic stripes were 70 x 0.8 cm and hung every 12 m on a distribution line.

     

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