Fig. (1) Comparison of size distributions of prey caught by pecking off substrates and by chasing flying prey. Ranks: 1 – prey smaller than 2 mm; 2 – prey larger than 2 mm and smaller than or equal to half of redstart bill length; 3 - prey larger than half and smaller than or equal to one bill length; 4 – prey larger than one bill length and smaller than or equal to 1.5 bill lengths; 5 – prey larger than 1.5 bill lengths. The inset shows a foraging Painted redstart in a display pose (photo by P. G. Jablonski).