Age is more than a number -- In barn owls, it reveals how susceptible one is to climate change

Young barn owls waiting for the return of a parent with prey. Fluctuations in weather and the environment affect survival and reproduction of animals. But are all individuals within a population equally susceptible? Theory on the evolution in age-structured populations suggests not â€" those life stages that are more important for overall fitness should be less susceptible to environmental variation than other life stages.


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