The Relationship Between Hierarchy and Mortality

The more feisty physically healthy dominant birds that have the most sort of threatening song. Those birds attract mates that are of high quality because they're looking for a high quality nest in a good place to have some eggs and then those chicks are more likely to survive. If avian virus comes sweeping through the population the birds die from the bottom of the hierarchy upwards. The same thing is true with human beings there's an old saying when the aristocrats catch cold the working class dies of pneumonia right?