Bogota Bearded Tachuri (Polystictus pectoralis ssp. bogotensis)
The Bearded Tachuri (see depiction) is distributed over many parts of northern South America, the subspecies discussed here, hoevere is higly localized and does only occur in the Sabanas de Bogotá in the Department of Cundinamarca in central Colombia.
This form is now most likely extinct.
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edited: 13.09.2020