Over the course of this organism's lifecycle, the death rate is essentially constant; bird
Rate of mortality. A mortality rate is a measurement of the frequency of deaths within a population over a specific time period.
The proportional frequency of deaths in a given population over a given period of time; frequently expressed as the proportion of human fatalities during a public health emergency or the number of wildlife fatalities as a result of environmental hazards: During the most recent flu season, patients over the age of 80 had the greatest fatality rate.
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