Coccidia in Passerines from the la Loma Santa Maria Protected Natural Area, Michoacan, Mexico

The objective of the present study was to find the presence of coccidia in passerine birds in the La Loma de Santa María Protected Natural Area, Michoacán, Mexico. Non-sporulated coccidial oocysts were found in passerine birds in that locality. A total of 61 birds were captured during three field surveys from December 2022 to April 2023, obtaining fecal samples that were examined. A total of 39 samples examined were positive for non-sporulated coccidial oocysts. The bird species sampled were: Red Warbler (Cardellina rubra)1 Russet Ruisset Thrush (Catharus occidentalis)1; Cordilleran Flycatcher (Empidonax occidentalis)2; Yellow-throated euphonia (Euphonia hirundinacea)1; common finch (Haemorhous mexicanus)1; Nashville Warbler (Leiothlypis ruficapilla)1; Blue mockingbird (Melanotis caerulescens)6; Lincoln's sparrow (Melospiza lincolnii)4; Rusty-crowned ground sparrow (Melozone kieneri)1; Black and white warbler (Mniotilta varia)3; Brown-backed Solitaire (Myadestes occidentalis)1; Slate-colored Solitaire (Myadestes unicolor)2; Yellow-tailed grackle (Quiscalus mexicanus)7; Yellow-rumped Warbler (Setophaga coronata)1; Plumbeous Vireo (Vireo plumbeus);1. This is the first study to examine passerine birds from Michoacán.