Abstract
We documented a Northern Mockingbird (Mimus polyglottos) with a bill deformity consistent with Avian Keratin Disorder (AKD) from West Texas. However, bill deformities remain underreported in the literature and, as such, we also reviewed photographs deposited in participatory science databases for the genus Mimus to estimate rates of bill deformities for the group. We found individuals with deformed bills in Chilean (M. thenca), Galapagos (M. parvulus), Bahama (M. saturninus), Patagonian (M. patagonicus), Northern (M. polyglottos), Whitebanded (M. triurus), and Tropical (M. gilvus) mockingbirds. Within the genus Mimus, we found that Chilean Mockingbird had the highest proportion of individuals that showed evidence of a bill deformity (2.16%).