Colombian Grebe The Colombian grebe was an aquatic bird native to the Bogota wetlands in Colombia. The population of these subspecies of grebe was largely hit by loss of habitat and predation. Wetland drainage, siltation and reed harvest led to destruction of Colombian grebe habitat to a great extent. More importantly, predation by rainbow trouts and hunting by humans curbed the growth of grebe population in this area, with only 300 individuals surviving by 1968. The Colombian grebe population further declined drastically with only a few sightings reported in 1970s, with the last sighting being reported in 1977.
