Figs 21–26 in Four decades after Belton: a review of records and evidences on the avifauna of Rio Grande do Sul, Brazil*

Figs 21–26. Documentation updates for four species previously included in the main list of birds of Rio Grande do Sul, Brazil: 21, Chondrohierax uncinatus, adult female, Tenente Portela, 4 February 2017 (C. Furini); 22, Pseudastur polionotus, Vacaria, 3 May 2015 (E. Rezende); 23, 24, Calidris pugnax, presumed male, Tavares, 15 February 2015 (M. Alievi); 25, Chlidonias niger, molting nonbreeding adult, Mostardas, 8 January 2014 (P. Fenalti); 26, C. niger, adult in alternate plumage, Rio Grande, 8 March 2016 (R. Kurz).