About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Crows may Not be as Bad as Previously Thought

by Bidita Debnath on January 24, 2015 at 10:42 PM
Font : A-A+

 Crows may Not be as Bad as Previously Thought

A new study has helped demystify the bad reputation of crows. The research suggests that their notoriety is not entirely merited.

Corvids, the bird group that includes crows, ravens and magpies, are the subject of several population control schemes, in both game and conservation environments. These controls are based on the belief that destroying them is good for other birds. They are also considered to be effective predators capable of reducing the populations of their prey.

Advertisement

Researchers at the University of Castilla-La Mancha analysed the impact of six species of corvid on a total of 67 species of bird susceptible to being their prey, among which are game birds and passerine birds.

Author Beatriz Arroyo said that in 81 percent of cases studied, corvids did not present a discernible impact on their potential prey and furthermore, in 6 percent of cases, some apparently beneficial relationships were even observed.
Advertisement

According to the study, when crows were removed from the environment, in 46 percent of cases their prey had greater reproductive success, while their abundance fell in less than 10 percent of cases.

Additionally, these experimental studies carried out in nine different countries (Canada, France, Norway, Poland, Slovakia, Spain, Sweden, the UK and the USA) revealed that, if corvids are eliminated but other predators are not, the impact on the productivity of their prey would be positive in only 16 percent of cases; whilst without corvids and other predators, including carnivores, the productivity of other birds improves in 60 percent of cases.

This suggests that crows, ravens and magpies, amongst others, have a lower impact on prey than other threats. Compensatory predation can also occur, the researcher explains.

The study is published in the journal Ibis.

Source: ANI
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
News Category
What's New on Medindia
Can Adjusting Fatty Acid Intake Improve Mood in Bipolar Disorder Patients?
Insulin Resistance Doubles the Risk of Major Depressive Disorder
Emotional Healing
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.


Recommended Reading
Smart Crows: Research through Relational Matches
A recent research has revealed the smartness of crows....
Why are Crows Left or Right Beaked When Wielding Tools?
Known for their impressive stick-wielding abilities, New Caledonian crows show preferences when it ....
Basic 'Aesop's Fable' Task Completed by Crows
Among 6 basic water displacement tasks, crows completed 4, including preferentially dropping stones ...
Crows may Transport Prions to Other Locations
New research indicates that crows fed on prion-infected brains from mice can transmit these ......

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use