
Penguin Facts: Species, Behavior, Habitat & Adaptations
Penguins are flightless seabirds found primarily in the Southern Hemisphere. Their streamlined bodies, flipper wings, and unique adaptations make them excellent swimmers.

Bald eagles are large birds of prey and America's national symbol, known for their white heads, powerful builds, and remarkable recovery from near extinction.
| Attribute | Value |
|---|---|
| Scientific Classification | Kingdom: Animalia, Class: Aves, Order: Accipitriformes, Family: Accipitridae |
| Female Weight | 10-14 lbs (4.5-6.3 kg) |
| Male Weight | 6.5-10 lbs (3-4.5 kg) |
| Average Wingspan | 6.5 ft (2 m) |
| Flight Speed (Soaring) | 30 mph (48 km/h) |
| Diving Speed | 75-100 mph (120-160 km/h) |
| Eye Vision | 4-8x sharper than humans |
| Grip Strength | 400-1,000 PSI |
| Incubation Period | 35 days |
Bald eagles are not actually bald. The name comes from the Old English word 'balde' meaning white, referring to their distinctive white head feathers that develop around age five.
Bald eagle eyes contain two focal points enabling them to look forward and sideways simultaneously. Their vision is 4 to 8 times sharper than humans, allowing them to spot a rabbit from 2 miles away while soaring hundreds of feet high. Even more remarkably, they can see fish swimming beneath water surfaces despite glare and refraction that would blind most creatures.
Bald eagles are notorious thieves that steal over 20% of their meals from other birds, particularly ospreys. Scientists call this kleptoparasitism. Eagles harass ospreys mid flight until the smaller bird drops its catch, then swoop down to snatch it before it hits the water.
Eagle talons deliver 400 to 1,000 pounds per square inch of crushing force, roughly ten times stronger than human hands. Their 2 inch talons pierce and hold struggling fish or waterfowl while flying. This grip strength lets eagles carry prey weighing up to half their body weight, though attempting heavier loads sometimes drowns them when they cannot release fish that dive underwater.
Bald eagles build the largest nests of any North American bird, with record nests reaching 13 feet deep, 8 feet wide, and weighing over 2 tons. Pairs return to the same nest year after year, adding branches, moss, and grass annually. These massive structures grow so heavy they sometimes collapse entire trees.
By the 1960s, only 400 nesting pairs survived in the lower 48 states. The 1972 DDT ban and Endangered Species Act protection saved them. Today's 300,000 plus population proves humans can fix what they break.
Alaska hosts more bald eagles than all other states combined, with approximately 70,000 birds. During salmon runs, thousands of eagles congregate in single locations to feast on spawning fish. The Chilkat Bald Eagle Preserve sees over 3,000 eagles gather simultaneously each November, creating one of nature's most spectacular wildlife displays.
Continental Congress chose the bald eagle as the national emblem in 1782, despite Benjamin Franklin's famous preference for the turkey.
Native American tribes considered bald eagles sacred for thousands of years, using feathers in religious ceremonies that continue today.
By 1963, only 417 breeding pairs remained in the lower 48 states, pushing the species to the brink of extinction.
The bald eagle became the poster species for the Endangered Species Act and environmental movement of the 1970s.
Research showed bald eagles can dive at speeds up to 100 mph and generate over 400 pounds per square inch of grip strength.
Studies revealed eagles mate for life and return to the same nests for decades, adding material each year.
Scientists discovered eagles can see ultraviolet light, helping them detect urine trails of prey and spot fish underwater.
Tracking data showed some bald eagles migrate over 3,000 miles between breeding and wintering grounds.
The bald eagle appears on the Great Seal of the United States, presidential flag, and countless government emblems.
Eagle feathers remain legally protected for Native American religious use under specific federal permits.
The species became a global symbol of successful conservation and proof that endangered species can recover.
Live bald eagle webcams attract millions of viewers worldwide, connecting people with wildlife.
Before DDT was banned, bald eagles faced extinction in the continental United States. Pesticide contamination caused reproductive failure across their range, and the national symbol appeared destined to survive only in Alaska and Canada. Shooting, habitat loss, and poisoning compounded the crisis.
The bald eagle recovery stands as conservation's greatest triumph. From fewer than 500 breeding pairs in the 1960s, populations exploded to hundreds of thousands of birds. Eagles now nest in every contiguous state, occupy urban areas, and have become so common that wildlife managers focus on human coexistence rather than population recovery.
Benjamin Franklin opposed making the bald eagle the national bird, preferring the wild turkey which he considered more respectable
Bald eagles can swim using a butterfly-like wing motion if they land in water
Eagles have been clocked stealing fish from ospreys in over 20% of observed hunts
The oldest known wild bald eagle lived to at least 38 years old
Bald eagles can lock their talons and cartwheel through the sky during courtship or territorial battles
Alaska has more bald eagles than all other states combined—approximately 70,000 birds
Eagle nests are called aeries, and some have been used continuously for over 30 years
Bald eagles don't develop their iconic white head until 4-5 years of age; juveniles are entirely brown
During salmon runs in Alaska, over 3,000 bald eagles can gather in a single area
Bald eagle populations recovered from 417 pairs in 1963 to over 316,000 individual birds today
The species was removed from the endangered list in 2007, marking a major conservation milestone
Eagles now nest in all 48 contiguous states for the first time in over half a century
Their recovery demonstrates how banning harmful pesticides can reverse ecological damage
Bald eagles serve as indicators of ecosystem health in waterways across North America
How much do you know? Take this quick quiz to find out!
Bald eagles are not actually bald. Their name comes from an old English word 'balde' meaning white, referring to their white head feathers.
Eagle nests can weigh over 2 tons and measure 10 feet across, the largest tree nests of any bird in North America.
Young bald eagles do not get their distinctive white heads until age 4 or 5, leading many people to misidentify juveniles.
Despite their fierce image, bald eagles often steal food from other birds rather than hunting, a behavior called kleptoparasitism.
Benjamin Franklin never officially opposed the bald eagle. His turkey comment was in a private letter and was partly humorous.
Bald eagles can swim using their wings in a butterfly stroke motion to drag heavy fish to shore.
The name 'bald' comes from an old English word 'balde' meaning white, not hairless. Adult bald eagles have distinctive white head feathers that contrast sharply with their dark brown body, making the head appear white or 'bald' from a distance.
This article is reviewed by the Pagefacts team.
Editorial Approach:
This article chronicles one of conservation's greatest comebacks while revealing surprising facts about eagle abilities, the myths surrounding Benjamin Franklin's opinion, and how the national symbol went from near extinction to thriving abundance.
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