As far as I know, small feild mice can live in tall Bulrushes.....but maybe I am wrong. Double check maybe :) But, I thought I read that they can live in them without killing them, they just eat out a hole, then move in.
There are quite many parasites doing that, living in another organism while letting it live. The most common example is the flea, or tick, attaching itself and sucking blood. But there are many other, and far more exotic examples, such as an arthropod practically biting off a fish´ tongue and replacing it with its own body, and worms living inside the eyestalks of snails!
... a parasite.
an animal without a backbone and a vertebrate is and animal without a back bone
A fluid feeder is an animal that lives by sucking nutrient - rich fluids from another living organism or plant.
A Duck Aquatic means plant or animal that lives in a pond or aquarium
A parasite.
A parasite
parasite
A parasite.
A parasite.
A parasite.
The answer is "parasites"
parasites
A parasite
A parasite
it is a termight
it is a termight