Summary
During the breeding migration of Bufo bufo in 1971 the number of females was counted, killed by traffic on an asphalt road with about 10 cars/hour. By counting egg-strings the total number of females was estimated too. By comparing both data it appeared that 30% of the females passing the road were run over. For the males a similar percentage is expected.
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van Gelder, J.J. A quantitative approach to the mortality resulting from traffic in a population of Bufo bufo L.. Oecologia 13, 93–95 (1973). https://doi.org/10.1007/BF00379622
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DOI: https://doi.org/10.1007/BF00379622