The review of videos produced 1,090 bird observations, 29.4% of them corresponding to birds crossing the infrastructure under the catenary and thus facing collision risk. Trains running the 321.7 km line between Madrid and Albacete (Spain) at speeds up to 250–300 km/h were equipped with the system during 66 journeys along a year, totaling approximately 14,700 km of effective recording. Photographs of the train front taken before and after each journey were used to improve the record of killed birds.
An observer standing in the cabin behind the driver controlled the system and filled out a form with data of collisions and bird observations in front of the train. We present the results obtained with an experimental on-board system to record bird-train collisions composed by a frontal recording camera, a GPS navigation system and a data storage unit. Safety and logistic difficulties have precluded until now mortality estimation in railways through carcass removal, but information technologies can overcome such problems. However, high-speed trains produce unknown avian mortality due to birds using the railway and being unable to avoid approaching trains. Large high-speed railway (HSR) networks are planned for the near future to accomplish increased transport demand with low energy consumption.
3Jefatura de Producción, Gerencia de Servicios Comerciales Este, Renfe Viajeros, Madrid, Spain.
2Terrestrial Ecology Group, Departamento de Ecología, Universidad Autónoma de Madrid, Madrid, Spain.1Servicios Especializados de Consultoría e Investigación Medioambiental, Madrid, Spain.Malo 2 *, Israel Hervás 2, Cristina Mata 2, Sebastián González 3, Ramón Morales 4 and Jesús Herranz 2