Quantum redactiones paginae "Melopsittacus undulatus" differant

m (Fontes et nexus)
* [http://www.pappasimpa.it/cose-da-sapere/95-i-colori-dei-cocoriti.html Colores ''M. undulatorum'']. {{Ling|Italiane}}
* [https://www.youtube.com/watch?v=cUpGRQK7o78 Vide gregem ''M. undulatorum'' bibentium atque e falcone effugientium] apud [[YouTube]].
* [http://www.sciencedirect.com/science/article/pii/S037663571100252X M.L. Millera, A.C. Gallup, A.R. Vogel, S.M. Vicario, A.B. Clark; [http://www.sciencedirect.com/science/article/pii/S037663571100252X ''Evidence for contagious behaviors in budgerigars (Melopsittacus undulatus): An observational study of yawning and stretching'']. {{Ling|Anglice}}
 
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