While the cerulean warbler's status maybe particularly (i)____________, it is just one of the many species of migrant birds whose numbers have been (ii)____________ for years. Increasingly, biologists investigating the causes of these (iii)____________ are focusing on habitat loss in the Tropics, where the birds spend the winter. A. precarious B. underreported C. pairings D. secure E. falling F. migrations G. representative H. copious I. declines