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

Organic tricuspid regurgitation, Organic Tricuspid Regurgitation Here ...

Organic Tricuspid Regurgitation Here the valve is anatomically abnormal. Etiology of Organic tricuspid regurgitation: 1) Rheumatic 2) Non rheumatic 1. Infective e

Characteristics of hormones, CHARACTERISTIC S OF HORMONES - (1)      T...

CHARACTERISTIC S OF HORMONES - (1)      They are regulatory chemicals that control and coordinate functions of different body organs. (2)      Hormones are formed by ductle

Explain the indirect methods of microbial estimation, Explain the Indirect ...

Explain the Indirect Methods of Microbial Estimation? Indirect methods, i.e., methods other than those counting the microbial cells can also be used for quantitation purpose. T

Define the prevalence and incidence of bulimia nervosa, Define the Prevalen...

Define the Prevalence and Incidence of bulimia nervosa? Bulimia nervosa appears to have become more prevalent during the past 30 years. We do not have much data on Indian popul

Determine the prosthetic planning, Determine the prosthetic planning Co...

Determine the prosthetic planning Complete prosthetic planning has to be done and the implants planned accordingly. Thereafter the surgical phase should be carried out. Once th

Competence of larval tissue or multiple responses, Competence of Larval Tis...

Competence of Larval Tissue or Multiple Responses The responsiveness of different larval tissues to thyroxine is markedly different. The tissues of the tail becomes necrotic

Explain the pseudomonas - characteristics of bacteria, Explain the Pseudomo...

Explain the Pseudomonas - Characteristics of Bacteria? Pseudomonas are aerobic, gram negative, straight or slightly curved rods that are motile by polar flagella. Many species

Types of leukemia, Types of Leukemia Leukaemia may be chronic  or acut...

Types of Leukemia Leukaemia may be chronic  or acute and is classified  into  the  following  categories:  i)  Acute Lymphocytic Leukaemia (ALL) This is  the most comm

Determine the procedure of armamentarium, Determine the Procedure of Armame...

Determine the Procedure of Armamentarium 1. Make an impression of the mandibular ridge and pour the cast in type 3 gypsum 2. Apply separating medium and allow it to dry 3

Appendical skeleton, it consists of the girdles and the skeleton of the lim...

it consists of the girdles and the skeleton of the limbs

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