Phenology of Molothrus testis development, estimated using log-normal periodic regression (data from Payne 1973, Condor 75: 80-99).

 
  Part of: Barker K, Wells M, Rowsey D (2017) The use of avian museum specimen data in phenology studies: prospects and challenges. Proceedings of TDWG 1: e20324. https://doi.org/10.3897/tdwgproceedings.1.20324