No, frogs usually close their eyes when swallowing their food. The muscles related to their eyes help them in the process of gulping food down their throat.
No.
Yes!
No.
no
toads
no
Yes, bats do actually sleep with their eyes open although they do have the ability to shut them. Frogs and fish also sleep with their eyes open and surprisingly so do cattle! However, as they are unconscious they are not able to see.
yes frogs do eat small spiders
Frogs eat grasshoppers. At least i know bull frogs and wood frogs do.
they eat orther frogs
No, praying mantises do not eat frogs, they eat insects. Frogs are far too large for a praying mantis to eat them.
Frogs eat flies and other bugs.