Joel Cracraft, Historical Biogeography and Patterns of Differentiation within the South American Avifauna: Areas of Endemism, Ornithological Monographs, No. 36, Neotropical Ornithology (1985), pp. 49-84
No takes yet. Share an insight, caveat, or question.
Joël Cracraft (1985) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: