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Content with tag breeding density .

The most attractive birds don’t reproduce more successfully

A study coordinated by the Doñana Biological Station (EBD-CSIC) and the Pyrenean Institute of Ecology (IPE-CSIC) shows that the physical attractiveness of birds does not determine their reproductive success.
The results, contrary to expectations, demonstrated that the density of mates and competitors did not influence whether the most attractive males had more or fewer descendants .