[_yb2s]

You misunderstood what I was trying to say. I closely know people that do this work with the specific personal goal of protecting bird populations. They are confident they are able to do so, and I have faith in their level of competence based on knowing them well, and also being a scientific researcher in a different but related field. I expect this to carry zero weight as an argument, I’m just explaining where I am coming from.

I am curious enough that I will ask these details and follow up if I can…

[vouaobrasil]

> They are confident they are able to do so

I am certain they are confident they are able to effect change within the limitations that the economic system provides, which is also another difference.

[_yb2s]

So I asked- and they said (1) when the facility is large enough, which many are, you can randomly sample locations and if they died from injuries elsewhere these will still end up in the sample; (2) they do a lot of separate experiments to measure things like the rate of carcass removal by scavengers which go into the calculations; (3) depending on the type of bird and turbine, in most cases injuries are immediately fatal, and they can quantify this for each case with direct observation.

I’ll myself add that presumably the data collected on larger farms can be used as a prior to make accurate inferences on smaller farms.