Simultaneously, the populations of peregrines, bald eagles, and other birds of prey continued to decrease.
(the populations of peregrines, bald eagles, and other birds of prey; continued; T:Simultaneously) (the populations of peregrines, bald eagles, and other birds of prey; to decrease; )
the populations of peregrines, bald eagles, and other birds of prey the populations of peregrines, bald eagles, and other birds of prey
continued to decrease
T:Simultaneously