https://www.birdsinbulgaria.org/big_year.php?l=en&vid=396&year=2016
Big year, Observed Eurasian Jackdaw, List of bird species
Observed Eurasian Jackdaw, Big year, Birds in Bulgaria, On-line bird guide. Each species has a brief description, pictures of the species in its natural...
eurasian jackdawlist ofbird speciesbigyear