hello everyone,

i just spotted the first common swifts of the year yesterday afternoon.
they're such neat little birds, partially because their appearance is a
signal that spring has sprung, but also because they give me a sense of
familiarity with nearly every place i've lived or visited in europe (in the
summer, at least).

of course, this raises the age-old question: Why do some birds migrate
short distances whilst others undertake extraordinary journeys across
continents and oceans, whilst many others do not migrate at all?

today, i share a hot-off-the-presses paper that seeks to explain this
behavioural phenomenon in a fundamental way

Why Some Birds Migrate (And Others Don't)
http://www.forbes.com/sites/grrlscientist/2018/05/07/why-some-birds-migrate-and-others-dont/
tinyURL: https://tinyurl.com/y78kjthv

I hope this piece was interesting and illuminating. as always, thanks for
reading, and I hope you share this piece widely amongst your friends and
other bird-lovers out there.

cheers,


--
GrrlScientist | at GrrlScientist <https://twitter.com/GrrlScientist>
grrlscientist at gmail.com
Blogs: Forbes <http://www.forbes.com/sites/grrlscientist/> | Evolution
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Podcasts: BirdNote Radio <http://birdnote.org/contributor/grrlscientist>
Keep up with my writing: TinyLetter <https://tinyletter.com/grrlscientist>
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sunt lacrimae rerum et mentem mortalia tangunt. [Virgil, Aeneid]
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