Dynamics of the number of swallow burrows in a separate section of the Birikchulsky colony (South Siberia, valley of Askiz river)

Data on the dynamics of the number of swallow burrows in one of the sections of the Birikchulsky colony are presented. It was observed from 2014 to 2019. A relatively sharp increase in the number of burrows was recorded, from 12 Pcs in 2014 to 210 Pcs in 2015. In the next four years, their number on the site stabilized and varied in a relatively narrow range: from 195 to 217 Pcs.