%0 Journal Article
%T Unusual late mass occurrence of the Common Swift (Apus apus (Linnaeus, 1758)) (Aves: Apodidae) in Sofia (Bulgaria)
%A ZLATOZAR BOEV
%J ZooNotes
%D 2012
%I Plovdiv University
%X An observation of about 120 Common Swifts over the central part of the Sofia City on 15 October is reported.
%K Common swift
%K avian phenology
%K autumn migration
%K urban avifauna
%K swifts in Bulgaria
%U http://nature.uni-plovdiv.bg/uploads/bechev/zoonotes/ZooNotes_2012/Zoonotes_27_2012_Boev.pdf