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African fish eagle in Lake Zway, Ethiopia. The African fish eagle is a large bird. The female, at 3.2–3.6 kg (7.1–7.9 lb) is larger than the male, at 2.0–2.5 kg (4.4–5.5 lb). This is typical sexual dimorphism in birds of prey. Males usually have wingspans around 2.0 m (6.6 ft), while females have wingspans of 2.4 m (7.9 ft).
A wing-clipped Meyer's parrot perching on a drawer handle. While clipping is endorsed by some avian veterinarians, others oppose it. [7]By restricting flight, wing clipping may help prevent indoor birds from risking injury from ceiling fans or flying into large windows, but no evidence shows that clipped birds are safer than full-winged ones, only that clipped birds are subject to different ...
Eagle photos Archived 6 June 2012 at the Wayback Machine on Oriental Bird Images; Eagle videos on the Internet Bird Collection; Web of the Conservation Biology Team-Bonelli's Eagle, of the University of Barcelona; Decorah Eagles: 24/7 Live Webcam from The Raptor Resource Project Archived 1 March 2012 at the Wayback Machine
Fish locomotion. Fish locomotion is the various types of animal locomotion used by fish, principally by swimming. This is achieved in different groups of fish by a variety of mechanisms of propulsion, most often by wave-like lateral flexions of the fish's body and tail in the water, and in various specialised fish by motions of the fins.
1938. Type. woodcut. Dimensions. 43.5 cm × 43.9 cm (17.1 in × 17.3 in) Sky and Water I is a woodcut print by the Dutch artist M. C. Escher first printed in June 1938. The basis of this print is a regular division of the plane consisting of birds and fish. Both prints have the horizontal series of these elements —fitting into each other like ...
The 13-day-signs of this trecena, starting with 1 Earthquake, 2 Flint/Knife, 3 Rain, etc., are shown on the bottom row and the right column Aztec calendar stone ; 1502–1521; basalt ; diameter: 358 cm (141 in.); thick: 98 cm (39 in.); discovered on 17 December 1790 during repairs on the Mexico City Cathedral ; National Museum of Anthropology ...
Bird trapping techniques to capture wild birds include a wide range of techniques that have their origins in the hunting of birds for food. While hunting for food does not require birds to be caught alive, some trapping techniques capture birds without harming them and are of use in ornithology research.
[45] [46] Like most marine mammals, orcas have a layer of insulating blubber ranging from 7.6 to 10 cm (3.0 to 3.9 in) thick beneath the skin. [45] The pulse is about 60 heartbeats per minute when the orca is at the surface, dropping to 30 beats/min when submerged. [47] An individual orca can often be identified from its dorsal fin and saddle ...