>>> and -- every year, more than 300 species of birds migrate through the bay area along the pacific flyway. what can shifts in the birds flight paths tell us about our environment? >>> support for quest is provided by the s. d. bechtel, jr. foundation -- the david b. gold foundation -- the dirk and charlene kabcene

>>> and -- every year, more than 300 species of birds migrate through the bay area along the pacific flyway. what can shifts in the birds flight paths tell us about our environment? >>> support for quest is provided by the s. d. bechtel, jr. foundation -- the david b. gold foundation -- the dirk and charle