[Tweeters] Why don't we see birds on blackberries?

[Jim Betz via Tweeters]

Hi

   Now that the blackberry season is past - I was reflecting on the fact 
that, to the best of my

knowledge, I've never seen a bird eating blackberries.  I went to the 
web and looked it up

and, according to the web, birds do eat blackberries.  So why haven't I 
seen them doing this?

In fact - my observation is that birds seem to avoid blackberry stands 
(as in, if there are

other bushes nearby you are much more likely to see any birds there than 
in the blackberries).

   Are the blackberries on the East Coast different than here in the 
West?  I even found

pictures of birds "in the blackberries" (but did not see very many of 
them actually feeding

on the blackberries).

- Jim