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

Extracellular signals, extracellular signals and their characteristics

extracellular signals and their characteristics

Implementation of nursing care in acute rheumatic fever, Implementation of ...

Implementation of Nursing Care Provide Bed Rest and Comfort   Your major role as a nurse is to provide bed rest to the child and assist the child and parents to understa

Importance of primary prevention of diabetes mellitus, Q. Importance of Pri...

Q. Importance of Primary prevention of diabetes mellitus ? Primary prevention has been found to be cost effective in the long run as it reduces unwarranted human suffering. Pre

Sporogenous tissue, Sporogenous Tissue The primary sporogenous cells (...

Sporogenous Tissue The primary sporogenous cells (PSCs) result after the periclinal division of the archesporial cells. The PSCs may undergo mitotic divisions and increase in

Prozoan, classifcation of protozoans

classifcation of protozoans

Define the major source of vitamin a, Define the major source of vitamin A?...

Define the major source of vitamin A? The major source of vitamin A, as you may be aware, is the carotenoid pigments which are synthesized by plants. Several carotenoid possess

Explain the procedure of balloon pulmonary valvuloplasty, Q. Explain the pr...

Q. Explain the procedure of Balloon Pulmonary Valvuloplasty? Right heart study is done to measure the transvalvular gradient and exclude supravalvular and subvalvular component

What is the meaning of oedema, What is the meaning of Oedema? In some p...

What is the meaning of Oedema? In some pathological conditions the body is in a positive water balance; that is the intake of fluids is greater than the excretion, and the pati

Neo darwinism or synthetic theory of evolution, NEO DARWINISM OR SYNTHETIC ...

NEO DARWINISM OR SYNTHETIC THEORY OF EVOLUTION - It is the synthesis of the ideas of Neo Darwinians as a new theory of evolution based upon recent findings of genetics and m

Define categories of fatty acids, Define Categories of Fatty Acids? The...

Define Categories of Fatty Acids? The fatty acids can be discussed under following heads: Saturated and Unsaturated, Short chain, medium chain and long chain,

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