The Colombian Amazon centres on Leticia at the Triple Frontier with Brazil and Peru, with Amacayacu National Park's pink dolphins, the Tikuna indigenous communities, and Puerto Nariño's quiet rainforest village two hours upriver.
Dry season with low river levels exposing beaches, jungle walks accessible above water level, and pink dolphin spotting at concentration points along channels.
Wet season with the river rising 12m, flooded igapó forest accessible by canoe through the canopy, and Tikuna fishing season at peak with abundant catches.
Transition month with rivers still high, mosquito density manageable, and the Leticia waterfront markets at full activity with local fish and chambira fibre crafts.
Wet season returning with the river beginning to rise, jungle still walkable in mornings, and the rainforest at peak greenery.