what is their language?
The Māori language.
Māori people
The Māori language, also known as (pronounced [ˈmaːoɾi, te ˈɾeo ˈmaːoɾi]) or simply ("the language"), has the status of an official language. 
what is a australasian gannet? A large seabird. where is it found? Steep Point in Western Australia, along the southern and eastern Australian coastline to the vicinity of Rockhampton in Queensland, as well as the North and South Islands of New Zealand, Lord Howe and Norfolk Islands. what does it eat? Forage fish and cephalopods. apart from this bird what are the other predators of the first one? Other fishes like tuna, striped bass, cod, salmon, barracuda and swordfish, as well as sharks, whales, dolphins, porpoises, seals, sea lions, and seabirds. where are they found? They are found along coastlines and also in lakes and rivers. does the original bird have a unique call? A  harsh "arrah-arrah" or "urrah-urrah". who are its predators? Southern giant petrel , kelp gull, and Pacific gull. how does the first one mate? It sexual maturity at six or seven years of age and the breeding season begins in October. what does it eat? Fish, krill, squid, offal , and waste from vessels. what is the sub-species of the second bird you mentioned? "L. d. dominicanus" and  "L. d. vetula" . can you please describe the third bird that you mentioned? A very large white gull with dark wings and back, and a very thick red-tipped yellow bill. what efforts are being made to conserve the original bird? It is a species of least concern, as the population is large and appears to be growing. what relation does it have with humans? They were used as food, and their feathers were used for decorative purposes and were also worn by the important members of the Māori tribe. do you know where is this tribe located? Mainland New Zealand.
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Māori people [SEP] Language
The Māori language, also known as (pronounced [ˈmaːoɾi, te ˈɾeo ˈmaːoɾi]) or simply ("the language"), has the status of an official language. Linguists classify it within the Eastern Polynesian languages as being closely related to Cook Islands Māori, Tuamotuan and Tahitian. Before European contact Māori did not have a written language and "important information such as was memorised and passed down verbally through the generations". Māori were familiar with the concept of maps and when interacting with missionaries in 1815 could draw accurate maps of their ( boundaries), onto paper, that were the equal of European maps. Missionaries surmised that Māori had traditionally drawn maps on sand or other natural materials.