A practical natural-history survey of the country's mammals, presenting concise accounts of each major group—marsupials, ungulates (pigs, deer, cattle, sheep, goats), cetaceans, carnivores (cats, dogs, mustelids, seals), bats, and rodents and insectivores—mixing identification, habits, distribution, and veterinary or agricultural relevance. It emphasizes how most terrestrial mammals are human introductions, contrasts introduced and native species, documents ecological impacts and modes of arrival, and notes species commonly encountered around settlements and coasts. Arranged in short, accessible chapters, the work aims to encourage observation and elementary zoological study for schools and general readers.