Meanings of foot clapper in English

Numbers of light- footed clapper rails Rallus longirostris levipes, an endangered bird inhabiting southern California salt marshes, have substantially declined from historic levels.

RAPD (randomly amplified polymorphic DNA) analysis was employed to assess the genetic variability within and among four of the largest remaining light- footed clapper rail populations.

Considering the few bands that were polymorphic among the light- footed clapper rail populations, a surprisingly high level of population differentiation (GST = 0.28) was found.