University College Dublin bird observations - 1973 to 1998

This folder holds data that CP entered from ledgers provided by K. Cathcart recording birds on the campus of University College Dublin, Belfield, Co. Dublin, Ireland from 1973 to 1998.  Birds were recorded weekly with either presence/absence or abundance codes.  These data have not been cleaned, and are known to have errors (e.g. some impossible dates including 31 November 1985 were written in the original ledgers and have been transcribed exactly into this dataset).  

These data have not been double-checked to identify entry errors.