Eastern Phoebe (Sayornis phoebe) Science Article 2
abstract
Parental care is advantageous because it typically increases the survival ofgenetically related young. In contrast, parental care given to unrelated young incurs no benefit.A further cost of parental investment is that it reduces the future reproductive potential of thecaregiver
Mark E. HAUBER, Folia Zool. – 55(4): 367-374 (2006)