Grails are not vertebrates, as they are nonliving. There is a family of birds called rails (Rallidae) which are vertebrates.
The rails, or Rallidae, are a large family of small to medium-sized birds.
A Zapata rail is a bird from the family Rallidae, with the Latin name Cyanolimnas cerverai.
A Calayan rail is a flightless bird from the family Rallidae which inhabits Calayan Island in the Philippines.
An African crake is a species of bird, Latin name Crex egregia, from the family Rallidae.
A paint-billed crake is a bird from the family Rallidae, Latin name Neocrex erythrops.
Takahe and pukeko are similar in appearance because, although the takahe is flightless and the pukeko is not, they are both members of the rail family (Rallidae).
A bilcock is another term for the European water rail, a small wetland bird, Latin name Rallus aquaticus, of the family Rallidae, which breeds in marshes and reedbeds across Europe and Asia.
habitat, niche, environment are all used to describe this.
habitat
it is a habitat
Aquatic habitat Terrestrial habitat Arboreal habitat