There are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: ibis'
Add an apostrophe s ('s) after the existing s at the end of the word: ibis's
Examples:
This ibis' nest has three eggs.
This ibis's next has three eggs.
Note: If you are a student, use the form that is preferred by your teacher.
The plural form for the noun ibis is ibises.
See the link below.
ibises
You may use ibis or ibises, both are correct.
The ibis isn't a person, it is a type of bird. The character of Doodle symbolizes the ibis.
mama ibis
a flock of ibis
Ibis Fernandez is 6'.
An African sacred ibis is another name for the sacred ibis, a species of wading bird in the ibis family, Latin name Threskiomis aethiopicus.
Crocodiles are predators of the White Ibis.
Madagascar Ibis was created in 1783.
Atherix ibis was created in 1798.
Green Ibis was created in 1789.
Jamaican Ibis was created in 1977.
Giant Ibis was created in 1877.