“Making a difference to the welfare of Animals doesn't require a massive effort; it requires small actions that can make a significant impact.”

Animal - something that lives and moves but is not a human, bird, fish, or insect

Pet - A domestic or tamed animal kept for companionship or pleasure.

Wild - Living or growing in the natural environment; not domesticated or cultivated.

Farm - An area of land and its buildings used for growing crops and rearing animals.

Zoo - A facility in which animals are confined within enclosures, displayed to the public, and in which they may also breed.

Species - A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.

Habitat - The natural home or environment of an animal, plant, or other organism.

Bird - a creature with feathers and wings, usually able to fly

Fish - A limbless cold-blooded vertebrate animal with gills and fins living wholly in water.

Mammal - A warm-blooded vertebrate animal distinguished by the possession of hair or fur, the secretion of milk by females 

Reptile - A vertebrate animal of a class that includes snakes, lizards, crocodiles, turtles, and tortoises.

Insect - A small arthropod animal that has six legs and generally one or two pairs of wings.

Veterinarian - A professional who practices medicine by treating diseases, disorders, and injuries in animals.

Endangered - (Of a species) seriously at risk of extinction.

Breeding - The mating and production of offspring by animals.

Feed - Give food to domestic animals or other organisms.

Groom - Clean the fur or skin of (an animal).

Train - Teach (a pet) to obey commands and perform tricks.

Adopt - Take up and use (an idea, method, or course of action), or legally take and bring up another's child 

Rescue - Save (someone or something) from a dangerous or distressing situation.

Endemic - native to a specific region or environment and not naturally found elsewhere.

Nocturnal - active during the night and inactive during the day.

Diurnal - active during the day and inactive at night.

Carnivorous - feeding on other animals.

Herbivorous - feeding on plants.

Omnivorous - eating both plants and animals.

Arboreal - living in or often using trees.

Territorial - defending an area against others of the same species.

Migratory - moving from one place to another, typically seasonally.

Domesticated - tamed and kept by humans as a pet or for farm produce.

Feral - (of an animal) in a wild state, especially after escape from captivity or domestication.

Venomous - capable of injecting venom by means of a bite or sting.

Invertebrate - an animal lacking a backbone, such as an insect or mollusk.

Vertebrate - an animal with a spine or backbone.

Pristine - in its original condition; unspoiled (used to describe natural habitats).

Biome - a large naturally occurring community of flora and fauna occupying a major habitat.

Fauna - the animals of a particular region, habitat, or geological period.

Flora - the plants of a particular region, habitat, or geological period.

Conservationist - a person who advocates or acts for the protection and preservation of the environment and wildlife.

Ecosystem - a biological community of interacting organisms and their physical environment.

Wildlife conservation - referring to the process of protecting animal species and their habitats.

Endangered species - species that are at risk of extinction.

Natural habitat - the natural environment in which a species lives.

Animal welfare - the well-being of animals in human care.

Captive breeding - the process of breeding animals in controlled environments within human care.

Habitat destruction - the process by which natural habitat is rendered unable to support the species present.

Ecological balance - the equilibrium between, and harmonious coexistence of, all living things.

Predator-prey relationship - the interactions between two species where one species is the hunter and the other the hunted.

Migratory patterns - the regular, usually seasonal, movement of a species from one place to another.

Biodiversity loss - a decrease in the variety of life within a given ecosystem.

Poaching activities - illegal hunting or capturing of wild animals.

Animal behavior - the scientifically studied actions or reactions of animals.

Extinction threat - the potential risk of a species disappearing completely.

Conservation efforts - activities designed to protect animal species and their habitats.

Breeding program - a scientific program aimed at increasing the population of a species through controlled breeding.

Animal rights - the idea that animals are entitled to the possession of their own lives and that their most basic interests—such as the need to avoid suffering—should be afforded the same consideration as similar interests of human beings.

Invasive species - non-native species that cause harm to the environment, human economy, or human health.

Veterinary care - medical care and treatment provided to animals by veterinarians.

Animal sanctuary - a facility where animals are brought to live and be protected for the rest of their lives.

Species diversity - the variety and variability of species in a specific region.

The lion's share - the largest part of something.

A fish out of water - feeling uncomfortable or out of place.

Hold your horses - wait a minute; slow down.

Let the cat out of the bag - reveal a secret.

Eagle-eyed - having excellent vision or keenly observant.

Like a bull in a china shop - behaving in a very clumsy or disruptive manner.

Monkey business - silly, mischievous, or deceitful behavior.

A wolf in sheep's clothing - someone who pretends to be nice but is not.

Birds of a feather flock together - people who are similar spend time together.

Busy as a bee - very busy or industrious.

Cry wolf - to give a false alarm; to call for help when you don't need it.

Wild goose chase - a foolish and hopeless search for or pursuit of something unattainable.

As quiet as a mouse - very quiet or silent.

Snail's pace - moving very slowly.

A cat's whiskers - an excellent or very appealing person or thing.