Revision 8

Animals are the heart of Planet Zoo 2. Every species is a realistically simulated creature with its own needs, and a habitat only thrives when those needs are met. The sequel rebuilds animal behaviour around what Frontier calls an improved animal brain, producing more natural and varied actions such as herding, grazing, and reacting to the world around them. Frontier highlights a generational leap in fidelity, with detailed fur, feathers, and scales, along with authentic breathing and sounds.

Behaviour is also more expressive. Layered animations communicate an animal’s mood and emotional state at a glance, without the player needing to open a menu, and species show off newly detailed actions such as more dynamic climbing and jumping, resting on raised frames, and rubbing against their surroundings.

The Animal Brain

Underneath those expressions sits what Frontier calls the animal brain, the set of systems that decides how a creature behaves across its zoos and reserves. It works as a reactive brain that sorts everything an animal can do into four kinds of action and lets it shift between them smoothly as the situation around it changes.

Mood feeds into all of this. An animal that is happy, sad, angry, or scared carries out the same actions in a different manner, shown through its appearance rather than a readout, whether that is a hot lion panting or an angry tiger flattening its ears. Those moods can spread, so a scared zebra alerts the rest of its herd to danger. Animals also read their surroundings, reacting to the time of day, the weather, the seasons, and the presence of predators, and seasonal fertility shapes when they court and breed.

Flying and aquatic species use the same brain but draw on different pools of behaviours. Birds weigh the cost of flying against walking and prefer perching if they are arboreal, while fish hold a preferred position in the water column and rest by hovering. Those differences are covered under Aviaries and Aquariums.

Welfare

Welfare is tracked through clear on-screen indicators, and animals now show more obvious physical reactions to their surroundings and condition, making problems easier to spot. Selecting an animal opens a panel with its name, species, age, and life stage alongside an overall welfare percentage broken into components, plus an Animal Appeal score that measures how much of a draw the animal is for guests.

The same panel carries direct actions, so a keeper can be assigned, a vet requested, or a clean ordered without hunting through a menu. Aquatic animals add a salinity requirement on top of the shared needs, and every species has its own temperature tolerance.

Breeding and Nesting

Players raise animals from their earliest moments and can breed them across generations. Planet Zoo 2 adds nesting, which the first game did not have: flying birds, flightless birds, and reptilian egg-layers all need a suitable nesting site for each breeding pair, and a pair cannot conceive until it has claimed one. Eggs are laid in the nest and incubated by the male, the female, or both depending on species, while reptiles leave their eggs to incubate alone, though some mothers stay to guard them.

Newly hatched flying birds are nestbound and depend on their parents. At fledging age they swap their shaggy juvenile look for adult plumage, but they still count as juveniles and do not press against a habitat’s adult population limit until they reach sexual maturity. Reptiles and flightless birds hatch free to explore straight away.

Cohabitation returns from the first game and takes on a larger role in management, letting compatible species share a single habitat. Frontier has said it will detail how cohabitation works closer to launch. Aviary birds can cohabit with other animals, which the studio has shown as part of its aviary coverage.

Conservation

Conservation is a central theme rather than a side objective. Animals can ultimately be released, and that effort extends beyond the zoo through the new Wildlife Reserves. Frontier says it researches every species with input from experts and from the IUCN Red List, and that its choice of aquatic species in particular was guided by real-world husbandry and ethical practice, keeping to animals that suit the habitats the game actually ships with.

The Zoopedia

The Zoopedia is the game’s in-game reference for every animal, and it is also published on the official website ahead of launch. Each entry covers the animal’s appearance, size and weight, taxonomy down to genus, wild population, conservation status, social and reproductive behaviour, and a set of real-world facts. New species are added in weekly drops, and Frontier notes the Zoopedia reflects work in progress, so text, images, and stats are not final.

Entries are filterable along four axes. Animals are sorted by where they are housed, across Habitat - Terrestrial, Habitat - Flying, Aquarium, and Exhibit; by biome, across twelve options; by region, across nine that include four ocean basins alongside the five landmasses; and by conservation status.

Catalogued Roster

Sixty-three species had Zoopedia entries as of early August 2026, of which fifty-seven belong to the base game and six come with the Deluxe Edition covered under Editions and Pre-Orders. Frontier has not revealed the final roster size, so this is a growing list rather than the complete lineup.

Two further species have appeared in official gameplay footage and developer commentary without a catalogue entry yet: the White-Tailed Eagle, shown in the Scottish Highland reserve, and the Great Hornbill, named by the team when describing rainforest flight behaviour. The Eurasian Beaver was also shown in the same reserve footage.

Wild population figures and conservation statuses are the real-world data the Zoopedia publishes for each species, not in-game statistics.