The Life Of Birds: Signals and Songs

Free Documentaries Online

Free Documentaries Online

Find us on:
  

Who's Online

We have 265 guests and 9 members online


The Life Of Birds: Signals and Songs
Close Ad
Lights off
Rate:
0 ratings
Views: 653

From: silichip
Videos: 2033
Added: 08-09-2012 17:29:05
Broadcast 25 November 1998, this installment describes ways of communicating. A colony of fieldfares in Sweden deters a raven from raiding a nest by collectively raising an audible alarm. However, in an English wood, all species co-operate to warn each other surreptitiously of approaching danger. By contrast, a sunbittern is shown expanding its plumage to discourage a group of marauding hawks. The members of the finch family exemplify how colour aids recognition. Birds have excellent colour vision, and the feathers of many species react to ultraviolet light. Flocking birds, such as sparrows, also have a 'ranking system' that determines seniority. In Patagonia, Attenborough demonstrates the effectiveness of sound: he summons a Magellanic woodpecker by knocking on a tree. The nature of tropical rainforests means that their occupants tend to make much louder calls than those in other habitats, and several such species are shown. Saddlebacks vary their calls so that even individuals from different areas can be identified. The dawn chorus provides a mystery, as there is still much to learn about why so many different birds sing together at the same time of day. (Proclaiming territory or attracting mates are two likely reasons.) Finally, Attenborough introduces the Superb Lyrebird as one of the most versatile performers: it is a skilled mimic, and this particular one imitates not only other species, but also cameras, a car alarm and a chain saw.
Url:
Embed:

Related Videos
0:49:18
Owner: silichip
Views: 546
Date: 08-09-2012
0:49:18
Owner: silichip
Views: 593
Date: 08-09-2012
0:49:18
Owner: silichip
Views: 679
Date: 08-09-2012
0:49:11
Owner: silichip
Views: 674
Date: 08-09-2012
0:49:16
Owner: silichip
Views: 804
Date: 08-09-2012
0:49:17
Owner: silichip
Views: 616
Date: 08-09-2012
0:49:17
Owner: silichip
Views: 711
Date: 08-09-2012
0:49:18
Owner: silichip
Views: 864
Date: 08-09-2012
Owner: silichip
Views: 863
Date: 06-12-2010
Owner: silichip
Views: 2448
Date: 06-12-2010
Owner: silichip
Views: 1056
Date: 06-12-2010
0:53:28
Owner: silichip
Views: 1079
Date: 06-12-2010
Owner: silichip
Views: 1099
Date: 06-12-2010
Owner: silichip
Views: 987
Date: 06-12-2010
Owner: silichip
Views: 997
Date: 06-12-2010
Owner: silichip
Views: 863
Date: 06-12-2010
Owner: silichip
Views: 947
Date: 06-12-2010
Owner: silichip
Views: 1072
Date: 06-12-2010
Owner: silichip
Views: 972
Date: 06-12-2010
Owner: silichip
Views: 995
Date: 06-12-2010

Category
0:53:10
Owner: silichip
Views: 201
Date: 13-09-2014
0:52:56
Owner: silichip
Views: 114
Date: 13-09-2014
0:59:06
Owner: silichip
Views: 740
Date: 11-05-2013
0:58:34
Owner: silichip
Views: 1544
Date: 01-05-2013
0:59:05
Owner: silichip
Views: 984
Date: 01-05-2013
0:54:38
Owner: silichip
Views: 1131
Date: 30-03-2013
0:54:27
Owner: silichip
Views: 587
Date: 30-03-2013
0:53:57
Owner: silichip
Views: 475
Date: 30-03-2013
0:54:29
Owner: silichip
Views: 475
Date: 30-03-2013
0:54:25
Owner: silichip
Views: 702
Date: 29-03-2013
0:57:59
Owner: silichip
Views: 1248
Date: 29-03-2013
1:29:25
Owner: silichip
Views: 1652
Date: 22-03-2013
0:40:24
Owner: silichip
Views: 874
Date: 18-03-2013
0:54:32
Owner: silichip
Views: 936
Date: 09-03-2013
0:15:01
Owner: silichip
Views: 761
Date: 28-11-2012
0:48:24
Owner: silichip
Views: 985
Date: 24-11-2012
0:48:26
Owner: silichip
Views: 648
Date: 24-11-2012
0:48:09
Owner: silichip
Views: 599
Date: 24-11-2012
0:48:27
Owner: silichip
Views: 589
Date: 24-11-2012
0:26:48
Owner: silichip
Views: 672
Date: 20-11-2012
0:46:30
Owner: silichip
Views: 933
Date: 11-11-2012
0:58:35
Owner: silichip
Views: 890
Date: 20-10-2012
0:09:51
Owner: phillipernest
Views: 623
Date: 03-10-2012
0:01:30
Owner: phillipernest
Views: 875
Date: 03-10-2012
0:49:18
Owner: silichip
Views: 864
Date: 08-09-2012
0:49:17
Owner: silichip
Views: 711
Date: 08-09-2012
0:49:17
Owner: silichip
Views: 616
Date: 08-09-2012
0:49:16
Owner: silichip
Views: 804
Date: 08-09-2012
0:49:11
Owner: silichip
Views: 674
Date: 08-09-2012
0:49:28
Owner: silichip
Views: 653
Date: 08-09-2012
 
Joomla Tutorial by JoomlaShack
Watch Free Movies