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-   -   Do all birds migrate? (https://www.birdforum.net/showthread.php?t=385490)

prani_saa Tuesday 14th January 2020 06:26

Do all birds migrate?
 
As we all know birds can fly long distances freely unlike us humans. So, why would they prefer to remain at a same place? Do all they migrate?

fugl Tuesday 14th January 2020 07:58

No, they don't all migrate. Migration is dangerous, exposing them to all sorts of hazards along the way, and they only do so when seasonal or other changes force them to.

LowellMills Monday 3rd February 2020 16:24

With very few exceptions, birds move somewhere else to do something. The smallest scale movements would probably be foraging, escaping predators and disturbance, or visiting roost sites. Then there's dispersal of young birds (usually of one sex more than the other) to new locations to reduce the chance of inbreeding between closely related birds when they start pairing up, and this can be small or very large distances.

However migration is not used to describe most of these unless they have a clear seasonal or annual character to them. Additionally some species really are very sedentary indeed, and travel almost no distance through their lives. Those species wouldn't be considered mobile, as birds go, let alone migratory.

nartreb Sunday 9th February 2020 04:25

1. Not all birds can fly.

2. Some species breed in the tropics. Generally these do not migrate (though some will move smaller distances to find available food in synchrony with the season - wet or dry).

3. In some species, not all of the population migrates. A good example is the American Robin. Named "turdus migratorius", most individuals do migrate, but some spend the winter in place, subsisting on stale berries.
https://www.davidalbeck.com/photos/2...jan10/i049.jpg

Nutcracker Sunday 9th February 2020 22:35

Quote:

Originally Posted by nartreb (Post 3957256)
1. Not all birds can fly.

Yet, despite this - some flightless birds do migrate - perhaps most notably Emperor Penguin, but several other penguins too :t:


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