Flightless birds, Biology

Assignment Help:
#Most of the world''s flightless birds are either nocturnal and secretive (e.g. the kagu) or large, swift and well-armed (the ostrich). The exceptions are found primarily on islands, and many of these island species have become extinct with the arrival of humans and their domestic animals.

What special biogeographical conditions on islands might permit the survival of flightless birds? Why has the colonization so often resulted in the extinction of such birds? The power of flight has been lost secondarily in representatives of many groups of birds; what are some possible evolutionary advantages of flightlessness that might offset its obvious disadvantages?

Related Discussions:- Flightless birds

In high altitudes is it necessary for the blood to have more, In high altit...

In high altitudes is it necessary for the blood to have more or less hemoglobin? In high altitudes the air is rarefied and oxygen concentration is lower than in low altitudes.

Pre-operative planning and implant exposure, Q. Pre-operative Planning and ...

Q. Pre-operative Planning and Implant Exposure? A hollow acrylic transitional restoration should be fabricated based on the original diagnostic preview with respect to the toot

Modern viral diseases, Important Modern viral diseases By  extensive us...

Important Modern viral diseases By  extensive use of vaccination and chemotherapy. Certain  serious viral diseases of the past. Like smallpox. Have been completely or largely e

she kept forgetting her appointment with the dentist, Listed below are exa...

Listed below are examples of behaviors that typify a defense mechanism at work. For each example choose the correct defense mechanism and explain the reason for your choice. 1. J

Determine the nutritional and functional role of bromine, Minerals : Bromin...

Minerals : Bromine                 Food Source       Brominated flour  Nutritional Functional role Not known to be essential to humans. Dough improver: KBrO 3 impr

Explain about abcc11 gene, Q. Explain about ABCC11 GENE? Wax in the ext...

Q. Explain about ABCC11 GENE? Wax in the external canal of the human ear may be wet or dry. Whether earwax is wet or dry has been traced to a gene called ABCC11, found on ch

Define effect of fat on quality and quantity of human milk, Define effect o...

Define effect of Fat on quality and quantity of human milk? Fat content of milk appears to be subject to variability as compared to other constituents. The average fat content

Excretion, Normal 0 false false false EN-IN X-NONE ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What are the structures that form the external ear, What are the structures...

What are the structures that form the external ear? What is its function? The internal ear comprises the pinna, or auricle, and the auditory canal. Its function is to conduct t

Avian leukosis (sarcoma group of retroviruses), A v i a n leukosis (Sar...

A v i a n leukosis (Sarcoma group of retroviruses) This is a complex of viral diseases caused by an avian retrovirus with various manifestations such as lymphoid leukosis,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd