Anecdotes can be useful in aggregate, where they can validate or give reason to question a claim. There is a lot of sloppy science and reporting on environment

Anecdotes can be useful in aggregate, where they can validate or give reason to question a claim. There is a lot of sloppy science and reporting on environmental subjects like these - look at the stuff about feral cats being a danger to songbirds estimating annual predation levels higher than the regional songbird population.