Two of three birds perched high in a snag along the main river. Ruddy Pigeon overlaps with the similar but larger Plumbeous Pigeon over much of northern South America. They are best distinguished by voice. Our guide identified them as Ruddy Pigeons based on the red eye and more rufous plumage. This identification has kindly been confirmed by Daniel Lane. Canon PowerShot SX60 HS.
References:
Baptista, L.F., Trail, P.W., Horblit, H.M., Boesman, P. & Sharpe, C.J. (2019). Ruddy Pigeon (Patagioenas subvinacea). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/54140 on 1 August 2019).
Ruddy Pigeon (Patagioenas subvinacea), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: https://neotropical.birds.cornell.edu/Species-Account/nb/species/rudpig