Bem vindo ao site da SPEA - sociedade portuguesa para o estudo de aves

Opções do site

Subscrever Newsletter

Outras opções do site

Pesquisar no site

Data actual

Principais opções do site

November 2017
D
S
T
Q
Q
S
S
 
 
 
1
3
5
6
7
8
9
13
14
15
16
17
18
19
20
21
22
23
24
27
28
29
30
 
 
Our Mission
SPEA is an Environmental not-for-profit organization whose mission is to support research and conservation of wild birds and their habitats, by promoting sustainable development for the benefit of future generations.
Home  > Participate > Workgroups > Nocturnal Birds > Nocturnal Birds in Portugal
print

Nocturnal Birds in Portugal

The nocturnal birds include two major groups: the nocturnal raptors (Strigiformes) and nightjars (Caprimulgiformes). These two groups have distinct morphological and ecological features, sharing however a typically crepuscular and nocturnal behaviour. In Portugal occur seven species of nocturnal birds of prey: the Barn-owl (Tyto alba), the Scops Owl (Otus scops), the Eagle Owl (Bubo bubo), the Little Owl (Athene noctua) the Tawny owl (Strix aluco), the Long-eared Owl (Asio otus) and Short-eared Owl (Asio flammeus) and two species of nightjars: the European Nightjar (Caprimulgus europaeus) and the Red-necked Nightjar (Caprimulgus ruficollis).


What is the ecological importance of nocturnal birds?

Nocturnal birds of prey are essential to regulate the balance of ecosystems by their position in the food chain: as top predators, they contribute to the sustainability of communities by controlling their prey. On the other hand, some species are positively linked to humans because they act directly in agricultural ecosystems. For example, the Barn-owl and Little Owl are used as aids in organic farming practices for biological pest control of rodents and insects. Additionally, nocturnal birds are susceptible to environmental contamination (bioaccumulation), and thus can be used as sentinels and bio-indicators of the levels of pollutants in ecosystems.






Policy and Security, Add to favorites, Suggest this website © 2010 spea - All rights reserved.
Seara.com