Hernández, Ángel. “Diet and Grit Characteristics in Young Eurasian Bullfinches (Pyrrhula Pyrrhula) Inhabiting Iberian Hedgerows”. Ornis Fennica 99, no. 4 (December 30, 2022): 163–183. Accessed December 19, 2024. https://ornisfennica.journal.fi/article/view/124715.