Showing posts with label Penguins. Show all posts
Showing posts with label Penguins. Show all posts

Saturday, October 17, 2009

Penguins



From Wikipedia:
Penguins (order Sphenisciformes, family Spheniscidae) are a group of aquatic, flightless birds living almost exclusively in the southern hemisphere, especially in Antarctica. Highly adapted for life in the water, penguins have countershaded dark and white plumage, and their wings have become flippers. Most penguins feed on krill, fish, squid, and other forms of sealife caught while swimming underwater. They spend about half of their life on land and half in the oceans.

Although all penguin species are native to the southern hemisphere, they are not found only in cold climates, such as Antarctica. In fact, only a few species of penguin live so far south. Several species are found in the temperate zone, and one species, the Galápagos Penguin, lives near the equator.

The largest living species is the Emperor Penguin (Aptenodytes forsteri): adults average about 1.1 m (3 ft 7 in) tall and weigh 35 kg (75 lb) or more. The smallest penguin species is the Little Blue Penguin (also known as the Fairy Penguin), which stands around 40 cm tall (16 in) and weighs 1 kg (2.2 lb). Among extant penguins, larger penguins inhabit colder regions, while smaller penguins are generally found in temperate or even tropical climates (see also Bergmann's Rule). Some prehistoric species attained enormous sizes, becoming as tall or as heavy as an adult human (see below for more). These were not restricted to Antarctic regions; on the contrary, subantarctic regions harboured high diversity, and at least one giant penguin occurred in a region not quite 2,000 km south of the equator 35 mya, in a climate decidedly warmer than today.
The penguin might not be the flightless, aquatic bird that we tend to believe and accept. Film taken by Terry Jones for the BBC shows a different story.

Penguins - BBC



View at YouTube.

Not so flightless it seems.

Wednesday, June 3, 2009

Follow The Poop!


Can you imagine a young child telling his or her teacher that he was going to study penguins by following their poop? Yet it is an easy, safe and cheap way to study penguin colonies.
Call it a case of high tech meeting low tech, really the lowest of tech.

British scientists are using pictures from high-powered satellites to pinpoint emperor penguin colonies in Antarctica.

The penguins are difficult to pick up on sea ice, because of their natural camouflage that helps them blend into the shadows -- so the British Antarctic Survey had to come up with another method.

Fortunately, penguin waste shows up nicely from space, staining the ice a light brown.

"We can't see actual penguins on the satellite maps because the resolution isn't good enough," said mapping expert Peter Fretwell. "But during the breeding season the birds stay at a colony for eight months. The ice gets pretty dirty and it's the guano stains that we can see."

The method helped scientists identify 38 penguin colonies -- of those, 10 were new. Of previously known colonies, six had re-located and six were not found.

"This is a very exciting development. Now we know exactly where the penguins are, the next step will be to count each colony so we can get a much better picture of population size," said penguin ecologist Phil Trathan.

"Using satellite images combined with counts of penguin numbers puts us in a much better position to monitor future population changes over time."

Estimates put the total number of penguins at between 200,000 and 400,000 breeding pairs.
Over the last decade we have seen the March of the Penguins, penguins dancing, penguins from New York City, and now we have scientists studying their poop. Perhaps a documentary is in the works?