27 August 2017 - FACTS ABOUT THE EAGLE

FACTS ABOUT THE EAGLE

G'day folks,

Welcome to some quick facts about a bird I am always seeking to photograph.

Amazing Facts About the Eagle

Eagles are some of the largest birds. They are at the top of the food chain, with some species feeding on big prey like monkeys and sloths. Eagles have amazing eyesight and can detect prey up to two miles away.

How many species of eagle are there?

Eagles are birds of prey in the family Accipitridae; there are approximately 60 different species. The majority are found in Eurasia and Africa, with only 14 species found in other areas including North, Central and South America, and Australia.

What do eagles look like?

With the exception of some vultures, eagles are generally larger than other birds of prey. They have strong muscular legs, powerful talons and large hooked beaks that enable them to rip the flesh from their prey.

Eagles vary in size. One of the smallest species, the little eagle, is around 17.7–21.7 in (45–55 cm). In contrast, Stellers’s sea eagle is around 36–42 in (91–106 cm) in size, and wingspan can reach approximately 72–96 in (2–2.5 m).

 What do eagles see?

 

Sight is the strongest of all eagle senses. The eyes are large, can take up almost 50% of the head, and can weigh the same amount as a human eye. An eagles vision is 4–5 times better than that of a human. Eagle eyes are angled 30 degrees away from centre of the face, which gives eagles a greater field of view.  

Eagles can see five basic colours to our three, and can detect UV light.

Cones are light detecting cells that are sensitive to colour. One of the reasons that eagles have better vision than humans is because their retinas, a layer at the back of the eyeball, have more cones. We have 200,000 cones per square millimetre, whereas eagles have one million.

 Do eagles mate for life?

 

Eagles are monogamous, so generally mate for life. They have strong site fidelity, so a mating pair tend to reuse the same nest year after year. Nests, composed of sticks, vegetation, and downy feathers, are built by both males and females.

Location of the nest varies with species. Bald eagles for example, most likely nest in tall trees whereas as golden eagles prefer cliff faces or more open areas.

How many eggs do eagles lay?

The number of eggs laid will depend upon species, but many eagles lay between one and three eggs; four egg clutches do occur, but they are rare.

 What do eagles eat? 

 

Eagles are apex predators, meaning they are at the top of the food chain. What eagles eat depends upon the species and the food that is available to them, but they are all carnivorous and live on a diet of meat and/or fish.

Eagles can be divided broadly into four groups; sea eagles, booted eagles, snake eagles and giant forest eagles. Booted eagles have a relatively wide diet consisting of birds, small mammals, reptiles, rodents, amphibians and insects, whereas others are more restricted. Sea eagles or fish eagles feed mostly on a diet of fish whilst snake eagles specialise on capturing reptiles. Giant forest eagles feed on various forest animals. One of the largest eagles, the Harpy eagle, feeds on larger animals including monkeys, sloths and coatis.

Clancy's comment: Amazing birds, eh? And, the Eagles rock band is pretty awesome as well.

I'm ...

 

 

1 February 2017 - FACTS ABOUT EAGLES

FACTS ABOUT EAGLES

G'day folks,

Here are some very interesting facts about one of my favourite birds.

• There are more than 60 different species of eagle.
• Eagles are different from many other birds of prey mainly by their larger size, more powerful build, and heavier head and beak. Most eagles are larger than any other raptors apart from vultures.
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• Eagles have unusual eyes. They are very large in proportion to their heads and have extremely large pupils. Eagles’ eyes have a million light-sensitive cells per square mm of retina, five times more that a human’s 200,000. While humans see just three basic colours, eagles see five. These adaptations gives eagles extremely keen eyesight and enable them to spot even well-camouflaged potential prey from a very long distance. In fact the eagles’ vision is among the sharpest of any animal and studies suggest that some eagles can spot an animal the size of a rabbit up to two miles away!
• Many eagle species lay two eggs, but the older, larger chick frequently kills its younger sibling once it has hatched. Adults do not intervene.
• The Harpy Eagle and the Philippine Eagle have wings that spread 2.5m across and use their massive, sharp talons, to kill and carry off prey as large as deer and monkeys. 
• In Greece, Golden Eagles eat turtles, dropping them from great heights onto rocks to break open their armoured shells.
• Although most eagles are carnivorous the African Vulturine Fish-Eagle is primarily vegetarian, feeding on rich oil palm fruits.
• Some eagles are built with short wings and long tails enabling them to hunt in the tight confines of a forest, while others have short tails and broad long wings allowing them to soar high above open plains and water.
• Golden eagles in Wyoming have been observed foraging across an area of 100 square miles.
• To defend their territories and attract a mate, bald eagles put on spectacular aerial displays including death-defying swoops and seemingly suicidal dogfights that involve locking talons with another bird and free-falling in a spiral.
• Eagles are admired the world over as living symbols of power, freedom, and transcendence.
• The spot where an eagle landed dictated to the ancient Aztecs the place where they were to build a city.
• In some religions, high-soaring eagles are believed to touch the face of God.
• Native Americans historically gave eagle feathers to non-indigenous people and also members of other tribes who were deemed worthy.
• Although many eagle populations are dwindling as a result of habitat destruction, hunting, and pollution, conservation efforts are helping some species such as the Bald Eagle which has made a dramatic comeback in the U.S. over the last few decades.
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 Clancy's comment: A spectacular bird in the sky. I could, and have, watched them for hours.

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