This study compared the community and diversity of birds in Mixed Ombrophylous Forest fragments of different sizes. To this end, eight fragments divided into sets forming two classes (from 20 to 70 ha and 100 to 420 ha) were selected in four farms in Guamirim district, municipality of Irati, Paraná state. The sampling method consisted of irregular transects traversed by natural areas. The experiment was conducted between 2009 and 2010, always in spring and autumn. Relative Frequency and Diversity were calculated by the Shannon index. The analyses Multiple Response Permutation Procedure (MRPP), Cluster, and Mann-Whitney (Wilcoxon) W test were used to compare the fragments. The results show that larger fragments present a distinct and more diverse community than patches smaller than 100 ha. Using irregular transects, we recorded 88 species of the total of 123 species recorded on site in transects and eventual observations.
birds; irregular transects; Mixed Ombrophylous Forest