BEAK AND FEET ADAPTATIONS IN BIRDS : BEAK AND FEET ADAPTATIONS IN BIRDS Mrs. Rani AshokLecturer (SS) in ZoologyLady Doak College, Madurai BEAK ADAPTATIONS : BEAK ADAPTATIONS Insectivorous : Insectivorous Small, wide and delicate for scooping or catching insects while on flight
Eg. Swift, Swallow Swift Swallow Wood chiseling : Wood chiseling Elongate, straight and chisel-like for drilling barks for food and nest construction.
Eg. Woodpecker Tearing and piercing : Tearing and piercing Short, pointed, sharp edged, powerful and hooked to tear the flesh of prey.
Eg. Eagle, Kite Eagle Kite Mud probing : Mud probing Long, slender for probing into water for larvae and worms
Eg. Jacana, Sand piper. Sand piper Jacana Water and mud straining : Water and mud straining Broad, flat, jaws with horny serrations and transverse lamellae that enable good catch of feed
Eg. Goose. Fish catching : Fish catching Long, powerful, pointed and spear-like for capturing fish, frogs and other food items
Eg. Kingfisher, Heron. Kingfisher Heron Spatulate : Spatulate Flattened, spatulate, spoon-like for searching worms, insects and small animals
Eg. Spoonbill. Pouched : Pouched Large gular pouches below lower jaw serves as fishing net
Eg. Pelican. Flower probing : Flower probing Long, pointed, probing beak that help in sucking honey and insects
Eg. Humming bird Seed eating : Seed eating Short, stout, conical, helping in piercing and cutting seeds and fruit stones. These are granivorous in nature feeing on grains
Eg. Sparrow. Cutting : Cutting Long, slender with cutting edge and has multipurpose use.
Eg. Crow Fruit eating : Fruit eating Sharp, massive, deeply hooked and strong for gnawing or breaking open of hard seeds
Eg. Parrot FEET ADAPTATIONS : FEET ADAPTATIONS Raptorial : Raptorial Gripping organ (formed of spines) and taloned feet with well-developed claws
Eg. Eagle, Kite, Vulture Eagle Kite Vulture Clinging : Clinging Clinging organ formed by 4 forwardly pointed toes
Eg. Swift, Humming bird Swift Humming bird Climbing : Climbing Grasping organ formed by 2nd and 3rd toes facing forward and 1st and 4th toes facing backwards
Eg. Parrot, Woodpecker Parrot Woodpecker Swimming : Swimming Webbed legs. In coots, they have lobate feet with free toes. In ducks – anterior three toes are webbed. In pelicans – all 4 toes are webbed
Eg. Coot, Duck, Pelican Coot Duck Pelican Wading : Wading Wading organ. Walls over aquatic vegetation/ marshes; web is absent or if present, feebly developed
Eg. Heron, Jacana Heron Jacana Perching : Perching Fastening organ is formed by one posterior placed, strongly built opposable hallux toe
Eg. Sparrow, Crow, Bulbul Sparrow Crow Bulbul Scratching : Scratching Running and scratching is done with stout feet with strong claws. Males are provided with pointed bony spur for offence and defense
Eg. Fowl, Pheasant Fowl Pheasant Other modifications : Other modifications Pectinate claw is seen in Poorwill and helps in scratching. Fleshy fringe of skin on toes is present in Ruffled grouse that helps in walking on snow
Eg. Poor will, Ruffled grouse Poor will Ruffled grouse Poor will Slide 24: Thank You