Animals must begin migration before conditions have deteriorated where they are, or they will miss the optimal conditions at ...

Implants that monitor the neural activity of frog embryos as they grow into tadpoles and then adults could offer a window ...

Object Details Author Lines, Richard Hellström, Leif Includes index. 1989 Call number TL770 .L56 1989 Type Books Physical description 271 p. : ill. (some col.) ; 31 cm Title Frog Smithsonian Libraries ...