LITERATURE. — Green & Sayer (1979); Holyoak & Seddon (1989); Dowsett (1993); Balanca & de Visscher (1997); Borrow & Demey (2001, 2014); Portier (2002c); Portier et al. (2002); Balanca et al. (2007); Sinclair & Ryan (2010); Pavia et al. (2012); Dowsett et al. (2013); ABC (2020).
FIELD DATA. — eBird; GBIF; WABD.
STATUS. — Resident; Breeding.