Birds are representatives of the whole nature. They are easily noticeable and observed. Thus, the condition of various bird species reflects the state of the whole ecosystem. This is why in Natura 2000 Network habitats of birds play such a vital role. more »
At the end of summer a careful observer may notice grown-up ducks or geese without feathers. Should one help such birds or leave them alone? Read why and how birds change their plumage in "Birds change their plumage at the end of summer".
The eyes of large eagles and owls are as big as human eyes, although these birds weigh just about 3 to 7 kg. In some cases the eyes of an owl constitute 5 % of its weight.