“…The visual (diurnal or nocturnal) active clock hours with the different feeding lifestyles were related to the morphological, ultrastructural appearance and composition of the intra‐ocular pecten oculi as they appeared in the diurnal avian species. These findings suggest that the pecten oculi may play a crucial role in facilitating visual activity and feeding behavior in diurnal avian species, such as the omnivorous birds like the Garganey, Eurasian moorhen, common loon, and duck (Abumandour et al, 2021; Braekevelt, 1986; Scala et al, 2002); the carnivorous birds like the great horned owl (Braekevelt, 1994; Kiama et al, 1994; Rahman et al, 2010), red‐tailed hawk (Braekevelt, 1991b), common buzzard (Gültiken et al, 2012), seagull (Ince et al, 2017), black kite (Kiama et al, 1994), stork (Onuk, Tutuncu, Alan, Kabak, & Gezer, 2013), and sparrow hawk (Rajab, 2012); and the herbivorous birds like the budgerigar, quail, emu, ostrich, and sparrow (Braekevelt, 1998; Elghoul et al, 2022; Micali et al, 2012; Orhan et al, 2011; Rajab, 2012). But nocturnal birds were represented mainly by carnivorous birds such as the nighthawk (Braekevelt, 1984), common barn owl (Yilmaz et al, 2017), barred owl (Smith et al, 1996), and yellow‐legged gulls (Segovia et al, 2020).…”