It is because if they miss the fox a single time they are dead.
If they run away 999 times without needing to, it's no big deal. Making a lot of noise so other chickens run away too helps the herd.
You can laugh at the chickens, but the chickens you laugh at, are the kind of animals who survives.
The same are true for wolves: they run away from humans because they are too great a risk of injury compared to the size of the meal.
If you aren't willing to run away when not absolutely required, you will miss the one time you really needed to.
There is a cost to living in a constant state of fear and preparation, the opportunity costs are massive.
Humans don't have to look at an animal for a few days to figure out if it's a mouse or a fox.
But for people infected with the Coronavirus we are not more capable: the first 2-14 days a person is infected with the Coronavirus we cannot see it. Only medical tests can, and we can't test everybody around us.
So the smartest might be to run away 100 times to avoid the single person who is infected.
https://www.worldometers.info/coronavirus/coronavirus-incuba...
I'm trying to be charitable here...am I reading this correctly?
With the 1918 influenza, 1.7% of the world population died, many of them young people. This was still very traumatic to society, despite the fact that Europe had done its level best to kill young men for the previous four years in the trenches.
Right now, influenza has killed more than COVID-19, but people tend not to worry about that. Not new enough. About 300000 people a year die from influenza in a quiet year. Take your flu shots every year, people.
This one might be a virus but past pandemics like the Black Plague were bacterial in nature.
Many years back I read The Coming Plague about epidemiology and the disease cowboys who fight it. There is always a coming plague, known or novel. It was only a matter of time before we got a repeat of the Spanish Flu, or the Black Death. If not this time, then someday. Thinking otherwise is folly.