S754 * Retz's Helmetshrike * Swarthelmlaksman * Prionops Retzii

By Hannes van Rooyen - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=75898618
Shrike Laksman
Sources:
(*) https://en.wikipedia.org/wiki/Retz%27s_helmetshrike
(*) https://ebird.org/species/rethel1
(*) https://search.macaulaylibrary.org/catalog?taxonCode=rethel1