? nigrorum A.Collin, Hartert & Ejo, 1927 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Chordata class Aves order Passeriformes family Muscicapidae genus Muscicapa species Muscicapa caerulescens Name Homonyms ? nigrorum J.Whitehead, 1897 ? nigrorum A.Collin, Hartert & Ejo, 1927