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Penguin wings evolved into short, strong flippers causing flightlessness. [1] This green turtle is about to break the surface for air at Kona, Hawaii. A flipper is a broad, flattened limb adapted for aquatic locomotion. It refers to the fully webbed, swimming appendages of aquatic vertebrates that are not fish.
Our Emperor Penguin unit plan, tailored to elementary students, uncovers more about this remarkable arctic animal, diving deeper into their inimitable physical characteristics, habitat, life cycle ...
The emperor penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species and is endemic to Antarctica.The male and female are similar in plumage and size, reaching 100 cm (39 in) in length and weighing from 22 to 45 kg (49 to 99 lb).
The chinstrap penguin grows to a length of 68–76 cm (27–30 in) and a weight of 3.2–5.3 kg (7.1–11.7 lb), with the weight varying with the time of year. [3] Males are greater in weight and height than females. [5] The adult chinstrap's flippers are black with a white edge; the inner sides of the flippers are white.
Penguins also have them in the flippers and nasal passages. Seabirds distill seawater using countercurrent exchange in a so-called salt gland with a rete mirabile. The gland secretes highly concentrated brine stored near the nostrils above the beak. The bird then "sneezes" the brine out.
The Galápagos penguin (Spheniscus mendiculus) is a penguin endemic to the Galápagos Islands of Ecuador. It is the only penguin found north of the equator. [4] Most inhabit Fernandina Island and the west coast of Isabela Island. [5] The cool waters of the Humboldt and Cromwell Currents allow it to survive despite the tropical latitude.
In 2008, Shirihai treated the little penguin and white-flippered penguin as allospecies. [10] However, as of 2012, the IUCN and BirdLife International consider the white-flippered penguin to be a subspecies or morph of the little penguin. Little penguins from New Zealand and Australia were once considered to be the same species, called ...
The model may show the anatomy partially dissected, or have removable parts allowing the student to remove and inspect the modelled body parts. Some models may have changeable genital inserts and other interchangeable parts which permit a unisex model to represent an individual of either sex.