LOS ANGELES (AP) — Federal wildlife authorities will take an unprecedented step in helping a wind energy company breed endangered California condors to replace the ones that have been killed by wind turbines.

The energy company Avangrid’s proposed mitigation project predicts that up to two adult condors and each of their two chicks or two eggs will die by a fatal injury over a 30-year period.

Scott Sobiech, field supervisor for the wildlife service’s Carlsbad and Palm Springs offices, said in a statement that a draft plan for Avangrid Renewables’ Manzana Wind Power Project includes “working wi...