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

Which of the vertebrate classes are warm-blooded, Which of the vertebrate c...

Which of the vertebrate classes (a) are 'warm-blooded', (b) reproduce by laying eggs?   (a) Birds and mammals are 'warm-blooded'. (b) Fish, Amphibia, Reptiles

Explain wire loop and tube method, Explain Wire loop and Tube Method 1....

Explain Wire loop and Tube Method 1.  Use a 25-gauge dental injection needle, cut to remove beveled end 2. Both ends of-mm diameter steel ligature wire passed through the ne

Describe about the secondary prevention - food allergy, Describe about the ...

Describe about the Secondary Prevention - Food Allergy? Secondary allergic preventive measures will focus on: Initiating prospective surveillance of infants, young child

Physical properties of carbohydrates, PHYSICA L PROPERTIES All mono...

PHYSICA L PROPERTIES All monosaccharides which have an asymmetric carbon are able to rotate polarized light either to left side ( laevorotatory ) or right side ( dextroro

Explain about the plateau effect - energy balance, Explain about the platea...

Explain about the plateau effect - Energy Balance? You must have noticed that when people start following weight reducing diets, they lose weight rapidly in the beginning, then

Determine the failures at during abutment connection, During Abutment Conne...

During Abutment Connection Implants should be tested for the presence of any mobility and the radiographs should be taken. These radiographs are very vital as they serve as the

Define briefly about the cereal proteins, Define briefly about the Cereal P...

Define briefly about the Cereal Proteins? Cereal grains, properly ripened and dried for optimum storage stability, have protein content ranging from 6-20%. Proteins are found i

Pheromones serving functions other than reproduction, Pheromones Serving Fu...

Pheromones Serving Functions Other than Reproduction Besides sexual responses as described above pheromones mediate several other types of behaviour. Alarm pheromones have bee

Protozoa, what are characteristics of flagellata class ?

what are characteristics of flagellata class ?

What is the nitrogen waste in amphibian larvae, Q. What is the nitrogen was...

Q. What is the nitrogen waste in amphibian larvae and in the adult animal? The terrestrial adult excretes urea since amphibian larvae are aquatic they excrete ammonia.

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