Trichomonas gallinae infection and ad libitum food availability promote blood microbial invasion and decrease overwinter survival in European Greenfinches (Chloris chloris)

This study deals with the reasons for the high mortality and changes in body parameters of male greenfinches (Chloris chloris) during the Trichomonosis gallianae outbreak in Latvia in the winter of 2020/2021. The sample consists of 35 individual birds: we have carried out sequencing of their blood to check the condition of their blood microbiome before and during the epidemics (this is not included in this data file); we collected data on body mass, muscle score, fat score, and survival before (December 2020) and during epidemics (February 2021).