Personality of birds promotes adaptability of behavior
Just like humans, birds have different personalities which determine when breeding starts - life short science news

Studies in great tit (Parus major) have shown that breeding behavior changes under predation threat.

Aggressive and exploring birds, normally starting the laying of eggs late in the breeding season, shifted their breeding forwards, whereas more passive birds showed exactly the opposite.

Thus, breeding start is flexible, and depends on personality and external influences such as predation risk. Breeding success is not affected by personality. Together, this study shows the importance of different personalities within a population, so that survival of a species is more likely when external conditions change.

Read the full story: Ludwig-Maximilians-Universität München
Scientific publication: Nature Communications