... ciconiiform birds, following Peters (193 1), Hancock and Kushlan (198 4), and Hancock et al (199 2) 620 Biology of Marine Birds FIGURE 19. 2 Illustrations of heads and bills of representatives of the ... Frederick 199 7; 7, Kushlan and Bildstein 199 2, Palmer 196 2, Kahl 196 3; 8, Kahl 196 3, Hancock and Kushlan 198 4, Sepulveda et al 199 9; 9, Lack 194 9, North 197 9; 10, Owen 195 9, Butler 199 7, Hancock ... Hancock and Kushlan 198 3; 11, Palmer 196 2; 12, Hancock et al 199 2 © 2002 by CRC Press LLC Biology of Marine Birds Black-crowned Night Heron Yellow-crowned Night Heron White-faced Ibis Little Egret...