Birds have a protective membrane called a nictitating membrane that covers their eyes while flying in rain to help keep them moist and maintain visibility. Additionally, birds have specialized oil glands near their eyes that secrete oils to help repel water and maintain clarity of vision while flying in rainy conditions.
Birds, bats, sugar gliders, flying lizards and all animals that can fly.
No, but many understand each others alarm calls.
about 39-100
IF you can extrapolate that across the full year, that would be an average of 35.5 birds killed by each cat/each year. IF you can use that figure for all outdoor cats, you get a calculation of 4.1 billion birds killed each year.
Flying birds are not always larger. There are many bats bigger than many kinds of birds.
There are many different kinds of sparrow. All are flying birds.
False, pterosaurs were flying reptiles.
Birds, beavers and door-mice there are many more.
About 15 million birds die each year
Many are, engaging in social interaction with other penguins and with humans. Unlike flying wild birds, penguins are closer in temperament to pet birds.
Birds have a protective membrane called a nictitating membrane that covers their eyes while flying in rain to help keep them moist and maintain visibility. Additionally, birds have specialized oil glands near their eyes that secrete oils to help repel water and maintain clarity of vision while flying in rainy conditions.
Birds, bats, sugar gliders, flying lizards and all animals that can fly.
90,000 birds per year
Over 1,000 birds each year die from smashing into windows
Yes many birds in the wild life eat each other
about 1,000,000 each year