Urban birds in Diorama, state of Goiás

Abstract

The urban avifauna of the north-western mesoregion of Goiás is currently poorly known. Therefore, this study analyzed the specific composition, richness, trophic niche and influence of the tree density variable on the birds of Diorama, at nine point counts in the municipal urban network. The data was obtained from visits between March and September 2023 (N=6), between 7:30am and 9:30am, totaling 12h. 61 species from 25 families were recorded, with Psittacidae (8 species), Columbidae, Tyrannidae and Thraupidae (all with 6) being the families with the greatest richness. The Black-throated Saltator Saltatricula atricollis (Vieillot, 1817), a species endemic to the Cerrado, was recorded at a point at the entrance to the urban network. The estimated richness Jackknife1=77.67 showed that 78.5 per cent of the expected species were recorded, a marginally satisfactory result, perhaps due to the few visits made to obtain the data. The distribution of species in trophic niche categories showed a predominance of invertivores and omnivores, as expected for urban birds. Bird richness and tree density were positive and significant (rs=0.700, p<0.05), and it is likely that afforestation influences bird richness. We recommend maintaining cultivated plants in order to conserve bird richness in the municipal urban network. Future studies will certainly reveal new aspects about birds in these anthropogenic environments in and around north-west Goiás.