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A talon is the claw of a bird of prey, its primary hunting tool. [6] The talons are very important; without them, most birds of prey would not be able to catch their food. Some birds also use claws for defensive purposes. Cassowaries use claws on their inner toe (digit I) for defence and have been known to disembowel people.
Their middle talon, the most enlarged claw on owls, measures an average of 19.1 mm (0.75 in). While not as large as those of the Ural owl, the talons are extremely sharp, stout and quite decurved. The claws are considered to be visibly more overdeveloped than those of other European mid-sized owls and the footspan including the claws is ...
The claws are typically curved and the radius of curvature tends to be greater as the bird is larger although they tend to be straighter in large ground dwelling birds such as ratites. [22] Some species (including nightjars , herons , frigatebirds , owls and pratincoles ) have comb-like serrations on the claw of the middle toe that may aid in ...
The calamus is hollow and has pith formed from the dry remains of the feather pulp. The calamus stretches between two openings—at its base is the inferior umbilicus and at its distal end is the superior umbilicus; the rachis of the stem, hosting the vanes, continues above it. [60] [61] Calamus derives from the Latin for 'reed' or 'arrow'. [62
Cassowaries have three-toed feet with sharp claws. The inner (first) toe has a dagger-like claw that may be 125 mm (5 in) long. [18] This claw is particularly fearsome, since cassowaries sometimes kick humans and other animals with their powerful legs. Cassowaries can run at up to 50 km/h (30 mph) through the dense forest and can jump up to 1.5 ...
Sassanid bowl with sitting griffin, gilted silver, from Iran.. The griffin, griffon, or gryphon (Ancient Greek: γρύψ, romanized: grýps; Classical Latin: gryps or grypus; [1] Late and Medieval Latin: [2] gryphes, grypho etc.; Old French: griffon) is a legendary creature with the body, tail, and back legs of a lion, and the head and wings of an eagle with its talons on the front legs.
Generally, fleshy fruits can be divided into two groups based on the presence or absence of a respiratory increase at the onset of ripening. This respiratory increase—which is preceded, or accompanied, by a rise in ethylene—is called a climacteric, and there are marked differences in the development of climacteric and non-climacteric fruits. [1]
There was a clear difference between early pterosaurs and advanced species regarding the form of the fifth digit. Originally, the fifth metatarsal was robust and not very shortened. It was connected to the ankle in a higher position than the other metatarsals. [ 70 ]