The Axis of rotation is an imaginary line passing through the centre of mass of any celestial body around which the celestial body rotates. The Earth makes one complete rotation around this imaginary axis every 23 hours 56 minutes 4 seconds. The line passes through the north and south poles of a planet.

axis

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STORK

The bird with the largest wingspan is the wandering albatross (Diomedea exulans) of the Sub-Antarctic oceans….Table of heaviest extant bird species.

ostrich

Here the list of 10 best singing birds in the world.

• 8 House Sparrow.
• 7 Channel-billed Cuckoo.
• 6 Song Thrush.
• 5 American Robin.
• 4 Rose-breasted Grosbeak.
• 3 Asian Koel.
• 2 Canary.
• 1 Common Nightingale.

Owl The owl

Some people believe the thrushes, such as the Wood Thrush, or the Veery, have the most beautiful bird songs. Many people love the cry of the Common Loon.

Cardinals

It’s a function of the breeding cycle. Birds declare and defend their territories with songs. Early to us is business as usual for them, especially the robins. They usually produce two clutches of eggs each year, so your friend might want to get some ear plugs if he doesn’t like the sound.

In terms of sleeping at night, most birds will enter their safe sleeping spot as soon as night sets in and will not venture out until the first light of day. This is done to protect themselves against nocturnal predators since diurnal birds are unable to see in the dark.

For many years, the prevailing theory was that those early hours are typically the coolest and driest hours of the day which allowed bird songs to travel the farthest, giving their voices better range. It’s sending a message to other males that they should stay away…and the farther away the better.

Mating call of the male koel bird is one of the most annoying sounds of spring | Daily Telegraph.

In fact, while singing, a bird can alternate exhaling between its two lungs and thereby sing in harmony with itself. In the final analysis, different birds sing different songs but usually for much the same reasons. One of those just might be that they are well fed, stress free and happy.

When birds are asleep they are at their most vulnerable to predators, so they have to choose carefully where they spend the night. They will tend to roost in large flocks in dense foliage in trees and shrubs, or find a cavity in a building, a hole in a tree or a nest box to sleep in.

Birds don’t usually drop dead in mid-flight – they die in their nest or are caught and eaten, much like other small animals.

And generally speaking, birds don’t fart; they lack the stomach bacteria that builds up gas in their intestines.

According to Scott Forbes of the University of Winnipeg, like humans, birds have tear ducts which secrete watery tears that protect the eye. So birds could cry if they wanted to, they just choose not to.

Grief and sadness: Grief is a complex emotion and just as all humans react differently when grieving, birds can also react differently. Birds have been documented as obviously looking for a lost mate or chick, however, and listless behaviors and drooped postures are common indicators of grieving birds.

Researchers in Brazil collected samples of healthy animals’ tears from seven species of birds and reptiles, including macaws, hawks, owls and parrots, as well as tortoises, caimans and sea turtles. …

A name is a critical connection tool amongst social species. Yes, Many birds including parakeets can learn to recognize their names. It is not an instant reaction or instinct but it can be taught. Through constant repetition of calling their name, they will slowly learn to recognize the sound.

In conclusion, birds do mourn the loss of their babies, after they lose their babies they mourn for days and even weeks. Birds that lose a mate will also mourn and can die of a broken heart. When a bird is about to die it chooses a safe and secluded place to do so.