Guianan Red Howler (Alouatta macconnelli), Mahaica River, Guyana.

Taken: 21 February, 2016Camera: Canon EOS 7D Mark IIFocal length: 500mmAperture: ƒ/4Shutter speed: 1/800sISO: 500Flash fired: no

Guianan Red Howler (Alouatta macconnelli), Mahaica River

Taken: 22 September, 2013Camera: Canon EOS 6DFocal length: 420mmAperture: ƒ/7.1Shutter speed: 1/500sISO: 250Flash fired: no

Atta Rainforest Lodge, Iwokrama, Guyana

Taken: 31 January, 2016Camera: Canon EOS 7D Mark IIFocal length: 700mmAperture: ƒ/5.6Shutter speed: 1/125sISO: 2000Flash fired: yes

"What should we do, Ceasar ?" A group of Guianan Red Howlers (Alouatta macconnelli) along the Mahaica River, East Coast Demerara.

Taken: 18 May, 2014Camera: Canon EOS 6DFocal length: 700mmAperture: ƒ/8Shutter speed: 1/400sISO: 1250Flash fired: yes
Guianan Red Howler (Alouatta macconnelli) sitting at the top of canopy along the Mahaica River.

Guianan Red Howler (Alouatta macconnelli) sitting at the top of canopy along the Mahaica River.

Taken: 22 September, 2013Camera: Canon EOS 6DFocal length: 420mmAperture: ƒ/7.1Shutter speed: 1/400sISO: 250Flash fired: no

Guianan Red Howler on Sloth Island, Essequibo River.

Taken: 18 January, 2014Camera: Canon EOS 6DFocal length: 420mmAperture: ƒ/6.3Shutter speed: 1/1250sISO: 1000Flash fired: no

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