I'm summarizing reported mortality (i.e. number of birds found dead) for the griffon vulture in central Italy from 1994 to 2016.
Reported mortality is a minimum guess with respect to actual mortality. It would be helpful to know about other researches based (e.g.) on substantial telemetry effort if there is some numerical comparison between the number of reported mortality events or dead birds with respect to the estimated death (not survival) rate from telemetry or unbiased data.
Hello Mario
I attached a paper about the spacio-temporal causes of non-natural mortality in the Spanish Imperial Eagle. In this paper the researchers studied the main causes of mortality and evaluated the differences between the mortality rates obtained from birds found fortuitously (eg received at the Wildlife Recovery Centers) with the rates obtained from tracked birds (unbiased). I think this work is very similar to what you're trying to do.
I hope you find it useful.
Article Causes and spatio-temporal variations of non-natural mortali...
Hi Juan, thanks for your suggestion. I'll read it carefully. Yes, basically it looks like what I am interested in. Unfortunately we have had not so many GPS instrumented vultures to do some data analysis based on them (and only adults), but it is worth to know. Thank you so much again Juan! Regards, Mario.
Ciao Mario!
I know about a review on survival estimates for raptors and owls (attached) that is maybe not exactly what you are looking for but perhaps has useful references to studies where mortality was assessed by the use of telemetry.
Un saluto! Elena
Thank you so much Elena, for the brand new paper, you are helpful as ever. Indeed, Ian Newton is not new to that.
Ciao e grazie, Mario.
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