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The drinking bird is a heat engine that exploits a temperature difference to convert heat energy to a pressure difference within the device, and performs mechanical work. Like all heat engines, the drinking bird works through a thermodynamic cycle. The initial state of the system is a bird with a wet head oriented vertically.
A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
The ecology of these species is often broadly similar but the tawny eagle usually dominates the bateleur in food competition. The tawny eagle steals food from other raptors in addition to catching its own prey and coming to previously dead food sources. [8] [12] The Afrikaans name for the tawny eagle is a "Roofarend", meaning the "Robber Eagle ...
The white-tailed eagle (Haliaeetus albicilla), sometimes known as the 'sea eagle', [4] is a large bird of prey, widely distributed across temperate Eurasia.Like all eagles, it is a member of the family Accipitridae (or accipitrids) which also includes other diurnal raptors such as hawks, kites, and harriers.
Using this method, accipitrids such as the golden eagle (Aquila chrysaetos), wedge-tailed eagle (Aquila audax), martial eagle (Polemaetus bellicosus) and crowned eagle (Stephanoaetus coronatus) have successfully hunted ungulates, such as deer and antelope, and other large animals (kangaroos and emus in the wedge-tailed) weighing more than 30 kg ...
[106] [113] The diet of eagle-owls in Norway was dominated in coastal areas by water birds, overall for the nation 53% of the food was made of birds, the species most commonly identified as caught being the 388 g (13.7 oz) common gull (Larus canus), 430 g (15 oz) common puffin (Fratercula arctica) and 2,070 g (4.56 lb) common eider (Somateria ...
Providing birds with a safe and warm space is just as vital as extra food at this time of year. "Robins often use nest boxes as roosting sites during the winter, so putting up a suitable nest box ...
Booted eagle nest Eggs, in the collection of Museum Wiesbaden. This eagle lays 1–2 eggs in a nest built from sticks and lined with green leaves in a tree or on a crag, or it takes over the disused nest of another large bird such as a black kite or grey heron. The female incubates the egg for around 45 days and is fed by the male, after ...