During the past 10 to 15 years, populations of certain amphibian species in California namely, red-legged frogs, foothills yellow-legged frogs, mountain yellow legged frogs and Yosemite toads have declined at an alarming rate.
(populations of certain amphibian species in California; have declined; T:During the past 10 to 15 years; T:namely)
populations of certain amphibian species in California
have declined
T:During the past 10 to 15 years T:namely