sewer, swerve, curve
The grasshopper cannot be found in the leaf litter habitat cuz it is not a suitable place and the environment is different from the field habitat
"Under field conditions" is more idiomatic.
because that is their habitat
the field
A mushroom's habitat is a field of green grass; such as gardens and farms
habitat
Desert conditions.
a ponies habitat is mostly in a field or paddock with plenty of grass to eat
snakes
A habitat is where an animal can usually be found. For instance, the habitat of frogs and newts are in damp places round a pond, or marshy area.
Arctic regions are the habitat of this animal, which has evolved to the harsh conditions there.