Population Decrease Factors

In order to see this content you need to have both Javascript enabled and Flash installed. Visit BBC Webwise for full instructions

A look at the factors behind a decrease in the population of barn owls.

The population of the barn owl is found to be under threat in the UK. Two major factors leading to this decline are emphasised - a lack of a food supply and a shortage of suitable nesting places.
From: Bitesize Key Stage 3 Science 3 Higher Paper
First Broadcast : 5 December 2007

Teachers' notes

Age Group : 9-11,11-14

Subject : Biology, Science

Topic : Living things in their environment, Food chains

Keywords : Population decrease, Barn owl, Environment, Habitat,Food supply, Voles,

Notes : Good study on factors affecting the size of animal populations - looks at the influence of habitat change, environmental factors, etc. Should lead to further research - for example, see Barn Owl Trust for more information on the barn owl and its population in the UK.

Search for more Learning clips...


Eclips Archive

eclips logo on screen

Need other subjects? More clips? Browse our archive Eclips site.

Recent Clips


BBC © 2014The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.