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1Radio antenna

Millions of birds are killed each year by radio antennas. Changing the static red light to a blinking light can cut the death toll by up to 70%.- Source


2. Despite having a wingspan of up to 7.5 feet and a height of up to 3.5 feet, a typical male bald eagle weighs only 9 pounds. - Source


3. When a crow dies, the other crows investigate if there's a threat where the death occurred, so they can avoid it in the future. - Source


4. City birds have learned to line their nests with cigarette butts in order to ward off parasites, as burnt nicotine works as an insecticide to ward off mites, lice, and fleas. - Source


5. An extinct bird named Rodrigues Solitaire had strange knob-like balls on its wings. These balls were used by the bird as a deadly weapon to defend territory and its mate. It also made a noise that sounded similar to thunder from a distance.- Source


6Owls

Owls have serrations on the edge of their flight feathers, allowing their flight to be practically silent. Some fish-eating owls, for whom silence has no evolutionary advantage, lack this adaptation.- Source


7. Despite their looks, falcons are more closely related to parrots than they are to hawks and eagles. - Source


8. A pigeon named Cher Ami was awarded the Croix de Guerre for its service during World War I. Cher Ami delivered the S.O.S. message of a lost, encircled battalion despite being shot through the breast, blinded in one eye, covered in blood, and with a leg hanging only by a tendon. - Source


9. The Emperor Penguin can dive to a depth of 1,850 feet (565 meters), which is deeper than any other bird and deeper than the operational range of most naval submarines.- Source


10. A type of seabird named Fulmar vomits a putrid and fishy smelling oil on its assailants in self-defense. Not only does it smell horrific, but it's lethal to predatory birds because it permanently glues their feathers together.


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11Crows

Crows are one of the smartest non-primate animals on earth, with the intelligence of a 7-year-old human. They use and manipulate tools, they have a long-term memory including facial recognition, and they understand analogy.- Source


12. Falcons on the Moroccan island of Mogador catch small birds and then proceed to remove their flight and tail feathers. They then imprison them in crevasses in the rocks to eat them later.- Source


13. The Dodo bird was actually a giant pigeon. It grew and lost its ability to fly due to Island Gigantism. - Source


14. The Australian Night Parrot is one of the most elusive and mysterious bird in the world. Only 3 people have had a confirmed sighting in over a century.- Source


15. Hummingbirds are continuously hours away from starving to death and consume the human equivalent of 140,000 calories per day to compensate. They enter a mini-hibernation mode (torpor) each night just to survive the suspension of calories.


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16Passenger pigeons

In 1886, there was a humongous flock of the now extinct passenger pigeons spotted in Southern Ontario. The flock was a mile wide, 300 miles long, and took 14 hours to pass a single point. There were estimated to be something in excess of 3.5 billion birds in that flock.- Source


17. The reason you never see a baby pigeon is because they only live in the nest for 30 days, at which point they start to look similar to adult pigeons.- Source


18. Not only are Gentoo penguins fiercely monogamous, they will violently banish any "cheaters" from their colonies. - Source


19. The eye color of owls indicates what time of day the owls prefer to be active. - Source


20. The Harpy Eagle parents prey on harder to catch food further away from the nest so that when the child eagle finally begins to hunt on its own, an abundant amount of easy to catch prey (like sloths and monkeys) are available close to the nest.- Source


21Birds vision

Most birds can’t move their eyes, which are not spherical like in mammals. They are also tetrachromatic, meaning they have 4 retinal cones (primary colors) versus 3 in humans, allowing most birds to see the UV spectrum and distinguish between colors that appear identical to humans. - Source


22. Some species of Hummingbirds can travel 385 miles on a single gram of fat.- Source


23. Crows have different warning calls for different predators. They have one for cats, and one for hawks, and another for humans. In total they can have up to 250 different types of calls.- Source


24. The first animal to ask an existential question was a parrot named Alex. He asked what color he was, and learned that he was “grey.”- Source


25. Crows in New Caledonia have been found to bend twigs into hooks that they use to extract food hidden in wooden logs, which confirms that wild birds can make tools.- Source

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