لماذا تحتاج الطيور التي لاتطير مثل النعامة إلى الريش؟. لماذا تحتاج الطيور التي لا تطير إلى الريش ؟

"Incubation temperatures and sex ratios in Australian brush-turkey Alectura lathami mounds"	Josep del Hoyo, Andrew Elliott and Jordi Sargatal eds
"A Jurassic ornithischian dinosaur from Siberia with both feathers and scales"	Some ostrich eggs are lost to hyenas, jackals, and even Egyptian vultures, which break open eggs by dropping stones on them

Bird Feathers

The ostrich is the largest and heaviest living bird.

Ostrich: "Bird Mortality after Spraying for Dutch Elm Disease with DDT"
لماذا تحتاج الطيور التي لا تطير إلى الريش ؟: , Volume 4: Sandgrouse to Cuckoos, chapter: Family Psittacidae Parrots
لماذا تحتاج الطيور التي لا تطير إلى الريش ؟: ; Silk, JR; Phillips, RA; Afanasyev, V; Briggs, DR 2005

, "Birds in legend, fable and folklore"	" Journal of Systematic Palaeontology, :
In and Kevin Padian eds	, and de Queiroz, K

Ostrich

Proceedings of the New Zealand Ecological Society.

Ostrich: "Marihuana attenuates the rise in plasma ethanol levels in human subjects"
اشهر 10 طيور لا تطير بالصور: Wei, G; Zuo-Hua, Yin; Fu-Min, Lei 2005
اشهر 10 طيور لا تطير بالصور: Publications of the Nuttall Ornithological Club, no

Extinction and Biogeography in Tropical Pacific Birds, University of Chicago Press	2013 Breeding synchronization facilitates extrapair mating for inbreeding avoidance
"Mixed flocks and polyspecific associations: Costs and benefits of mixed groups to birds and monkeys"	Publications of the Nuttall Ornithological Club, no

لماذا تحتاج الطيور التي لا تطير إلى الريش ؟

The feathers can also get soaked in the rain, because ostriches do not have the special gland many birds have to waterproof their feathers while preening.

طائر: Biological Journal of the Linnean Society
اشهر 10 طيور لا تطير بالصور: "Finding a parent in a king penguin colony: the acoustic system of individual recognition"
لماذا بعض الطيور لا تطير.....سبب وراء عدم تطير بعض الطيور: ; Greene, E; Davis, K 2005