“…Published descriptions of beak colour in ginginianus vary, but suggest it to be homogeneous (e.g. del Hoyo et al 1994, Naoroji 2006, Porter & Suleiman 2012, Angelov et al 2013, Londei 2018. However, the descriptions and photographs of the birds observed by Angelov et al (2013) and Londei (2018) are of heterogeneous beak colouration, a condition suggested by Ferguson-Lees & Christie (2001) to exist amongst some ginginanus birds.…”