rats
Digestion.
no, because the worm dies. it is just predator and prey
The Golith bird eating spider
Goliath bird having the habit of eating spiders.
A man saw it eating a humming bird
A duck can actually eat people when no one is looking. There has been reports for it eating babies when they are sleeping, so yeah, they are not grain eating animals
Alligators
It isn't exactly "turned into energy"; grain already HAS energy. When we eat it, we are eating the chemical energy stored in the grain.
try spiders
This should be fun! ant eats crumb, bird eats ant, snake eats bird, hawk eats snake, lion eats hawk, human eats lion. (This is just an example don't get worried about eating a lion!!!)
Yes, large birds and snakes have been know to eat Bird Eating Tarantulas.