Have you been reading the Farmers Almanac again? Did you ask the birds?
Sorry Al. I am always suspicious of this kind of folklore. But, I do have an open mind. If someone grew 100 trees, and only one was colorful, and they found the birds did not land on any other but the colorful one, I'd think differently. But then again, it might lead to more questions....can they see the ripe fruit?
Edit: Okay, I read at least one study. It
may be that the hypotheses is correct. I will step back and admit your statement is more likely true than not.
http://hmf.rutgers.edu/Pubs up to 1982/Stiles 1982b.pdf