salinedi0n/Junco-Dev-Photoperiod-PRSB-2026: Junco-Dev-Photoperiod-PRSB-2026 Zenodo Release

Archiving repository in Zenodo to meet publication requirements for Proceedings of the Royal Society B. Electronic Supplementary Material (data and R code) for "Developmental photoperiod alters the onset and capacity for reproduction in male Dark-eyed Juncos (Junco hyemalis)" Accepted by Proceedings of the Royal Society B in July 2026. DOI: 10.1098/rspb. Authors: Carlie Saline, Adam Fudickar, Allison Byrd, Ellen Ketterson, Timothy Greives Corresponding author: Carlie Saline, [e-mail] This work presents evidence that the daylengths songbirds experience before their first breeding season can influence the timing of reproductive capacity via measurements of GnRH-induced testosterone, cloacal protuberance volume, and fat scores.