
Sterkbyggður goggur kemur sér vel þegar hnetur og fræ eru á matseðlinum.
- Collar, N. (1997). Family Psittacidae (Parrots). Í: del Hoyo, J. o.fl. (ritstj.). Handbook of the Birds of the World. Sandgrouse to Cuckoos. Barcelona: Lynx Editions.
- Diamond, J. (1999). Dirty eating for healthy living. Nature, 400, 120–121. (Sótt 4. desember 2020).
- Benavidez, A. o.fl. (2018). Diet of Neotropical parrots is independent of phylogeny but correlates with body size and geographical range. IBIS, 160, 742-754. (Sótt 4.12.2020).
- Ara Parrot Scarlet Macaw - Free photo on Pixabay. (Sótt 4.12.2020).