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Pristis Linck, 1790. Sawfish, also known as carpenter sharks, are a family of rays characterized by a long, narrow, flattened rostrum, or nose extension, lined with sharp transverse teeth, arranged in a way that resembles a saw. They are among the largest fish, with some species reaching lengths of about 7–7.6 m (23–25 ft). [1]
Notice especially the width of the saw, the teeth on the saw, the shape of the tail and pectoral fins, and the position of the dorsal fin compared to the pelvic fins. The largetooth sawfish possibly reaches up to 7.5 m (25 ft) in total length, [3] but the largest confirmed was a West African individual that was 7 m (23 ft) long. [13]
The smalltooth sawfish is found in tropical and subtropical parts of the Atlantic, including the Caribbean and Gulf of Mexico. Its original range was the smallest of the sawfish species, covering about 2,100,000 km 2 (810,000 sq mi). [5] In the west it once ranged from the United States to Uruguay and in the east from Senegal to Angola. [1]
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 ...
Worm charming is a behavior also observed in non-human animals, especially among birds. The methods used vary; however, tapping earth with feet to generate vibrations is widespread. One common example is the " seagull dance". [7] The wood turtle also seems to be adapted for worm charming, as it is known to stamp its feet – a behavior that ...
There is an intricate link between various fishing techniques and knowledge about the fish and their behaviour including migration, foraging and habitat. The effective use of fishing techniques often depends on this additional knowledge. [1] Which techniques are appropriate is dictated mainly by the target species and by its habitat. [2]
Still determined, Russell grabs the fishing line with his teeth. Despite getting a small cut on his upper lip, Russell manages to reel in his catch with one tug. Unfortunately, the fish that caught Russell's line was a swordfish, which comes towards Russell at full speed, and impales Russell's head through his mouth, killing him instantly.
Bird anatomy, or the physiological structure of birds' bodies, shows many unique adaptations, mostly aiding flight. Birds have a light skeletal system and light but powerful musculature which, along with circulatory and respiratory systems capable of very high metabolic rates and oxygen supply, permit the bird to fly.