A member of the Hydrocharitaceae family, European frog-bit (EFB) was initially introduced in the 1930s as an escapee from an Ontario arboretum. Populations can now be found throughout the Great Lakes ...

Other species forgo the mating process and instead become meals. In the case of the European common frog, however, Rana temporaria, avoiding unwanted male attention, can go as far as faking death.

Emerging from a partially frozen pond more than 6,000 feet high in the Alps, European common frogs (Rana temporaria) set out to find mates and begin breeding activities. These frogs have adapted ...

A dense mat of European frog-bit (Hydrocharis morsus-ranae L.), identified by the green heart-shaped leaves and small, white flowers with three petals. In this module, students explore the spread of ...