Range map of Undulated Antshrike (Frederickena unduliger)
Adapted from: BirdLife International. 2018. Frederickena unduliger. The IUCN Red List of Threatened Species 2018: e.T22701244A130210797. https://dx.doi.org/10.2305/IUCN.UK.2018-2.RLTS.T22701244A130210797.en. Downloaded on 25 April 2021.
Cephas