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

Excretory , What are excretory organ and product of a lizard

What are excretory organ and product of a lizard

Antagonistic mechanisms manage homeostatic regulation, Q How do antagonisti...

Q How do antagonistic mechanisms manage homeostatic regulation? The homeostatic maintenance of the body typically occurs by means of alternating antagonistic compensatory mecha

What is the function of the left ventricle, What is the function of the lef...

What is the function of the left ventricle? Where does the blood go after leaving the left ventricle? The function of the left ventricle is to get blood from the left atrium an

Define functions of vitamin d, Define Functions of Vitamin D? Vitamin D...

Define Functions of Vitamin D? Vitamin D is required to maintain normal blood levels of calcium and phosphate, which are in turn needed for the normal mineralization of bone, m

Explain historical example of connecting models and data, Explain Historica...

Explain Historical Example of connecting models and data? An excellent instance of a program that links theory and data is collaborative work on the population dynamics of flou

Explain about the manganese - micro minerals, Normal 0 false ...

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

Food-borne clostridium, Food-borne Clostridium Clostridium botulinum a...

Food-borne Clostridium Clostridium botulinum and Cl. perfringens, the two members of the group have been implicated in food-borne illnesses. C. botulinum causes classical food

Functions of cerebrum, Functions of cerebrum The forebrain is otherw...

Functions of cerebrum The forebrain is otherwise called as ‘cerebrum'. It is highest centre for controlling several functions in the body, The most interesting aspect

Define excretion of toxin and act as precursor- carbohydrate, Define Excret...

Define Excretion of toxins and Act as precursors? Excretion of toxins: Glucuronic acid, a metabolite of glucose, combines with chemical and bacterial toxins and some normal met

Illustrate about the principle of context, Illustrate about the Principle o...

Illustrate about the Principle of Context A third principle guiding the neuropsychological assessment of children is that environment contexts help to constraint and determine

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