Looking on the internet deeply has found these results:

scare away the birds is the most popular phrase on the web.

scare off the birds 129,500 results on the web	scare away the birds 132,800 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Is it permissible that the owner of a fish farm has the right under Bavarian law to protect his property in the event of damage Disseminate the deck with scarecrows and shiny objects... without any inconvenience to scare away the birds. They say that Barajas Airport, used hawks to scare away other birds. All you do is loaf around and scare away the customers. e.g. by firing shots to scare the birds away as other measures are costly and ineffective? I expect that to scare away the mainstream media. Is the Commission in favour of utilising used carbide guns in order to scare the birds away from their sleeping areas?

scare off the birds

129,500 results on the web

scare away the birds

132,800 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Is it permissible that the owner of a fish farm has the right under Bavarian law to protect his property in the event of damage
Disseminate the deck with scarecrows and shiny objects... without any inconvenience to scare away the birds.
They say that Barajas Airport, used hawks to scare away other birds.
All you do is loaf around and scare away the customers.
e.g. by firing shots to scare the birds away
as other measures are costly and ineffective?
I expect that to scare away the mainstream media.
Is the Commission in favour of utilising used carbide guns in order to scare the birds away from their sleeping areas?