Offspring provisioning by extra-pair males in blue tits

Peter Santema & Bart Kempenaers
Most birds are socially monogamous with both parents providing offspring care, but sometimes individuals are observed to provision at a nest that is not their own. One possible explanation for this behaviour is that it is a fitness maximising strategy by males who have copulated with the female and hence potentially sired extra-pair offspring in the focal nest. Over a period of 8 years and among a total of 854 nests, we observed 12 blue...
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1 download reported since publication in 2021.

These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?