Where have you heard that? This field research looking at the problem, with pictures of the dead birds in question, does not indicate that's the problem https:/

Where have you heard that? This field research looking at the problem, with pictures of the dead birds in question, does not indicate that's the problem https://twitter.com/salasphorus/status/1304973085833981952 https://twitter.com/salasphorus/status/1304973085833981952, and that the problem is starvation. It may be starvation driven by fleeing smoke/climate, but that would just be uninformed speculation.