yes.
commensalism
no
A bird living on the top of a hippo, or a bird living in a cactus is an example of commensalism...:D
alligator and alligator bird
the bird sat on the cow
There is not a elephant bird living.
From elephant dung.
When a bird shelters in a tree, it is a form of commensalism. This is where the bird benefits but the tree is unaffected.
An example of commensalism in the grassland is when a bird builds its nest in a tree, using materials such as twigs and leaves, without harming the tree. The bird benefits by having a safe place to raise its young, while the tree is unaffected by the bird's presence.
the bird cleans and grooms the elephant while the elephant provides the bird with food (bugs, etc)
It's Called A Tic Tic Bird It Cleans All The Tics Of The Elephant
probably NOT