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

Nitrogen fixation and assimilation, Nitrogen is needed mostly for the synth...

Nitrogen is needed mostly for the synthesis of amino acids and nucleotides. Sources of nitrogen can be obtain from organic as well as inorganic sources, but the whole target is the

Explain the phase contrast microscope, Explain the Phase Contrast Microscop...

Explain the Phase Contrast Microscop? Unpigmented and unstained living cells can be easily observed by phase contrast microscope. It has a special objective and a condenser th

What is panoramic x-ray, What is Panoramic X-Ray This is one of the mos...

What is Panoramic X-Ray This is one of the most vital radiological techniques in planning placement of dental implants. Not only will it give you the complete picture of the pe

What do you determine by atriopore, What do you determine by Atriopore? ...

What do you determine by Atriopore? The external opening to atrium. In cephalochordates water passes across pharyngeal slits into atrium and from there leaves through atriopore

State the term - vibrio parahaemolyticus gastroenteritis, Vibrio parahaemol...

Vibrio parahaemolyticus gastroenteritis While most other known food poisoning syndromes may be contracted from a variety of foods,  V. parahaemolyticus gastroenteritis is contr

Copulation and fertilisation in hermaphrodites, Copulation and Fertilisatio...

Copulation and Fertilisation in Hermaphrodites Copulation between hermaphrodites is common. Flatworms possess a cirrus and penis that is inserted into the uterine vaginal ope

Sea Lampreys, #questiHow do the non parasitic lampreys interact with other ...

#questiHow do the non parasitic lampreys interact with other members of their ecosystem in comparison to their parasitic cousinson..

Bacterial diseases - colisepticemia, Bac t e r i a l diseases C ...

Bac t e r i a l diseases C o lisepticemia Colisepticemia, also known as colibacillosis caused by Escherichia coli, is the commonest disease condition in ill-mana

Candidiasis, Candidiasis Candidiasis (Moniliasis) is a disease of man, ...

Candidiasis Candidiasis (Moniliasis) is a disease of man, animals and birds and is caused chiefly by Candida albicans. Crop mycosis (thrush) of poultry is caused by C. albicans

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