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

Explain about urinary system, Explain about Urinary system Urinary sys...

Explain about Urinary system Urinary system provides us with the service of disposing the waste products carried by blood. This function is also known as excretion.

Explain about the renal and urogenital system, Explain about the Renal and ...

Explain about the Renal and Urogenital System? Various studies have shown a decrease in the creatinine and insulin clearance. Due to the changes in glomerular structure of the

How is hiv transmitted, How is HIV transmitted? What is the disease caused ...

How is HIV transmitted? What is the disease caused by this virus? HIV (human immunodeficiency virus) is supposed to be transmitted by blood, semen, maternal milk and vaginal se

Reproduction, What is the difference between asexual and sexual reproductio...

What is the difference between asexual and sexual reproduction

Lead strength, When the R-wave in the lateral precordial leads is less than...

When the R-wave in the lateral precordial leads is less than 10 mm the sensitivity of ST depression is very low if 1 mm of ST depression is used as a standard. The corrected ST for

Digestive system of animals, Q. Why is the digestive system of these animal...

Q. Why is the digestive system of these animals called incomplete? Incomplete digestive system is in that which the digestive cavity has only one opening.

Explain the term rastelli operations, Explain the term Rastelli operations ...

Explain the term Rastelli operations ? This is the operation of choice for transposition with VSD and left ventricular outflow obstruction. The principle of this operation is:

Dna, diagram of dna replication

diagram of dna replication

Technique-recurrence of angina, Technique:  Careful re-opening of ste...

Technique:  Careful re-opening of sternum and release of steinum from the underlying adhesion is done. Femoral artery and vein are exposed for going on femoro fenioral bypass

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