Author Contributions
The study was conceived by CSD and DSR. CSD and DSR conducted lab work.
HLD conducted the parentage analyses. CSD, DSR, HLD, JK, MH and TAB
performed fieldwork. CSD performed analyses and drafted the manuscript
with supervision from DSR. DSR, HLD, JK and TB managed the Seychelles
warbler project. All authors contributed critically to the work and
approved the final manuscript for publication.