Flightless birds and Migration of birds
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Transcript of Flightless birds and Migration of birds
Flightless birds and Migration of birds
Sana Ahmed
Roll no. 22
Flightless birds
• Also called Running birds- lack ability to fly• Have smaller wings• Keel absent• Easiest to take care in captivity• More feathers than flying birds
Examples of Flightless birds..
Ostrich (Struthio camelus)
Emu (Dromaius novaehollanidae)
Kiwi (Apteryx australis)
Cassowary (Casuarius bennetti)
Rhea (Rhea americana)
Penguin (Pygosclis papua)
Flightless cormorant (Phalacrocorax harrisi)
Kakapo (Strigops habroptilus)
Migration of birds
• Flying birds do seasonal migration• First recorded 3000 years ago by ancient
Greek authors Homer and Aristotle• Migratory birds pay high costs in predation
and mortality• Time of migration is controlled by different
environmental changes
Types of migration
•Short distance migration•Long distance migration
Short distance migration
Merlin Pied thrush
Wallcreeper Woodland Kingfisher
Long distance migration
Arctic tern Humming bird
Warbler Wader
Migration triggers
• Changes in day length• Changes in food supplies• Lower temperature• Genetic predisposition• Hormonal changes
Threats to migratory birds
Conservation