Fig. 4 in Alfonso Olalla And His Family: The Ornithological Exploration Of Amazonian Peru

Fig. 4. Map of the lower courses of the ríos Orosa and Apayacu, departamento Loreto, Peru. Seasonally flooded lowlands extend from the Río Amazonas northward to the dashed line and southward to the arcuate portions of the Río Orosa. The Olallas' locality ''Orosa'' was most likely at or near the circle (1, see text). Their ''Apayacu'' was at the current town of that name (2), on a small island between the mouth of the Río Apayacu and the Río Amazonas.