Dogs are established to have an acute sense of smell along with a lifestyle where they live in close proximity to human beings and communicate with them.
Most birds and pheasants in particular have don't have as well developed a sense of smell as you do and aren't liable to be within 100 yards of people for long.
Even if they could smell impending disease why would they particularly seek out a high place to announce this and how on earth would you distinguish this from a call which announced it's desire to mate or warning about predators including yourself.
Birds make noise all the time. They can't smell you from far away ergo they can't smell impending death. It's like an ink blot test any meaning you are finding is smuggled in by you.
Most birds and pheasants in particular have don't have as well developed a sense of smell as you do and aren't liable to be within 100 yards of people for long.
Even if they could smell impending disease why would they particularly seek out a high place to announce this and how on earth would you distinguish this from a call which announced it's desire to mate or warning about predators including yourself.
Birds make noise all the time. They can't smell you from far away ergo they can't smell impending death. It's like an ink blot test any meaning you are finding is smuggled in by you.