White-faced Saki (Pithecia pithecia) perched in a fruiting tree at Rockstone, Essequibo River, Guyana. Taken: 17 April, 2016Camera: Canon EOS 7D Mark IIFocal length: 500mmAperture: ƒ/5.6Shutter speed: 1/400sISO: 800Flash fired: no White-faced Saki (Pithecia pithecia) at the Pandama Winery, Madewini, Guyana. Taken: 6 November, 2014Camera: Canon EOS 7D Mark IIFocal length: 500mmAperture: ƒ/4Shutter speed: 1/60sISO: 800Flash fired: no White-faced Saki (Pithecia pithecia) male in Rockstone, Guyana. Taken: 14 September, 2014Camera: Canon EOS 6DFocal length: 700mmAperture: ƒ/5.6Shutter speed: 1/200sISO: 1000Flash fired: no White-faced Saki (Pithecia pithecia) female in Rockstone, Guyana. Taken: 14 September, 2014Camera: Canon EOS 6DFocal length: 500mmAperture: ƒ/4Shutter speed: 1/200sISO: 1000Flash fired: no