Frontispiece -- Title page -- Copyright page -- Dedication -- Preface -- Acknowledgements -- How to use this book -- A note on classification -- Alphabetical entries -- A -- A -- aardvark (Orycteropus afer) -- AAZK -- AAZPA -- Abandonment of Animals Act 1960 -- ABC species -- abdomen -- abdominal skinfold -- abductor muscle -- abiotic -- abiotic environment -- abiotic stress -- abnormal behaviour -- abomasal ulcer -- abomasum -- aboral -- abortion, miscarriage -- abrasion -- abscess -- absorption -- ABWAK -- abyssal -- academic journal -- academic paper -- acariasis -- acaricide, acaridicide -- accelerometer -- acceptable daily intake -- accidental -- acclimation -- acclimatisation, acclimation -- accredited herd -- accredited vet -- accredited zoo -- acetylcholine (ACh) -- acid -- acidity -- acidosis -- Acipenseriformes -- acoelomate -- acoustic signalling -- acoustic tag -- acoustic-lateralis system, lateral line system -- acrosome -- Act of Congress -- Act of Parliament -- ACTH -- actin -- actinomycosis -- Actinopterygii -- action potential -- activated charcoal -- active site -- active sleep -- active transport -- activity budget, behaviour budget -- acupressure -- acupuncture -- acute condition -- ad lib -- ad lib feeder -- ad lib sampling, opportunistic sampling -- ad libitum, ad lib -- Adamson, George (1906-1989) and Joy (1910-1980) -- adaptation -- adaptive heterothermy -- adaptive radiation -- adductor muscle -- adenine (A) -- adenohypophysis -- adenosine diphosphate (ADP) -- adenosine triphosphate (ATP) -- adipose -- adipose fin -- adipose tissue -- adoption scheme -- ADP -- adrenal cortex -- adrenal gland -- adrenal medulla -- adrenaline, adrenalin, epinephrine -- adrenocorticotrophic hormone (ACTH) -- advertisement -- advertisement call -- aerial census -- aerial gunning -- aerial photography -- aerial survey, aerial census -- aerobic.

aerobic respiration -- aerosol delivery system -- aestivation, estivation -- aetiology, etiology -- AEWA -- affective states -- afferent -- affiliative behaviour -- affiliative exhibit -- afforestation -- AfiFarm -- Africa USA -- African Elephant Conservation Act of 1989 (USA) -- Afrotropical region -- aftershaft -- agar plate -- age class -- age pyramid -- age structure -- age-specific mortality rate -- agglutination -- aggregation -- aggression -- aggressive mimicry -- Agnatha -- agonistic behaviour -- Agreement on the Conservation of African-Eurasian Migratory Waterbirds 1995 (AEWA) -- Agreement on the Conservation of Bats in Europe 1991 (EUROBATS) -- Agreement on the Conservation of Cetaceans of the Black Sea, Mediterranean Sea and contiguous Atlantic Area 1996 (ACCOBAMS) -- Agreement on the Conservation of Polar Bears 1973 -- Agreement on the Conservation of Small Cetaceans of the Baltic, North East Atlantic, Irish and North Seas 1991 (ASCOBANS) -- Agricultural Revolution -- agricultural show -- Agriculture and Agri-Food Canada (AAFC) -- agri-environment scheme -- agronomy -- AI -- air bladder -- air flow -- air sac -- air stone -- Airborne Hunting Act of 1971 (USA) -- airplane wing -- air-stripper -- airway -- AKAA -- alarm -- alarm call -- alarm pheromone -- alarm response -- albinism -- albino -- Albuliformes -- albumen -- albumin -- aldosterone -- alertness -- alevin -- Alex the African grey parrot -- alfalfa -- algal bloom -- alien species -- alimentary canal -- alkalage -- alkali -- alkaline -- allantois -- allele, allelomorph -- allele fixation -- allele frequency -- allele retention -- allelomorph -- Allen's rule -- allergen -- allergic reaction -- allergy -- alligator farm -- allocarer -- allogrooming -- allometry -- allomother -- alloparent, allocarer -- allopatric -- allopatric speciation -- allopreening -- all-terrain vehicle (ATV).

alpaca farming -- alpha (α) diversity -- alpha male -- alpha predator -- alpha status -- alpha-tocopherol -- alternating tripod gait -- alternative hypothesis (H1) -- altricial -- altruism -- altruistic behaviour -- alula (alulae pl.) -- alveolus (alveoli pl.) -- ambassador species -- ambient temperature -- ambivalent behaviour -- ambush behaviour -- ambush predator -- amebiasis -- amenorrhoea -- amensalism -- American Anti-vivisection Society (AAVS) -- American Association of Zoo Keepers (AAZK) -- American Association of Zoo Veterinarians (AAZV) -- American Association of Zoos and Aquariums -- American Birding Association (ABA) -- American Farm Bureau -- American Horse Council -- American Humane Association -- American Kennel Club -- American Livestock Breeds Conservancy (ALBC) -- American Museum of Natural History -- American Rare Breed Association (ARBA) -- American Society for the Prevention of Cruelty to Animals (ASPCA) -- American Society of Animal Science -- American Stud Book -- American Veterinary Medical Association -- Amiiformes -- amino acid -- amnion -- amniote -- amniotic egg -- amniotic fluid -- Amoeba -- amoebiasis, amebiasis -- Amphibia -- amphibian -- Amphibian Ark (AArk) -- amplexus -- ampulla (ampullae pl.) -- amputation -- amylase -- anabolic -- anabolic steroid -- anabolism -- anachoresis -- anadromous -- anaemia, anemia -- anaerobic -- anaerobic respiration -- anaesthesia, anesthesia -- anaesthesia induction chamber -- anaesthesia vaporiser -- anaesthesiologist -- anaesthesiology -- anaesthetic, anesthetic -- anaesthetic machine -- anaesthetics, anaesthesiology -- anaesthetist, anaesthesiologist -- anal glands -- analgesia -- analgesic -- analogous -- analysis of variance -- anaphylactic shock -- anapsid -- anatomical terms of location -- ancient forest -- ancient woodland -- androgen -- anemia -- anesthetic -- anestrous.

anestrus -- angel wing, airplane wing -- Anguilliformes -- animal -- animal £ -- animal actors -- animal advocate -- Animal Aid -- Animal and Plant Health Inspection Service (APHIS) -- animal ark -- Animal Behavior Society (ABS) -- Animal Behaviour -- Animal Boarding Establishments Act 1963 -- Animal By-Products (Enforcement) (England) Regulations 2011 -- animal carer -- animal cognition -- Animal Conservation -- animal cruelty -- animal cruelty and violence towards humans -- animal cruelty as a component of domestic violence -- animal cruelty laws -- animal dealer -- Animal Defenders International (ADI) -- animal density -- animal economics -- animal enclosure -- Animal Equity UK -- animal exhibit -- animal experience -- animal experimentation -- animal feed cake -- Animal Finder's Guide -- Animal Gatherings (England) Order 2006 -- animal grabber -- animal handling chute -- Animal Health -- Animal Health and Veterinary Laboratories Agency (AHVLA) -- Animal Health and Welfare Board for England -- Animal Health Trust -- animal hospital -- Animal Liberation -- Animal Liberation Front (ALF) -- animal loading -- Animal Machines -- Animal Magic -- animal needs index (ANI) -- animal noise monitor collar -- animal personality -- animal recognition technology -- Animal Record Keeping System (ARKS) -- animal records -- animal research -- Animal Research Act 1995 (NSW) -- animal ride -- animal rights -- animal rights legal cases -- animal rotation exhibit -- animal sentinels -- animal shelter -- animal show -- animal stars -- animal testing, animal experimentation, animal research -- animal theme park -- animal therapy -- animal trafficking -- Animal Transaction Policy -- Animal Welfare -- animal welfare -- Animal Welfare Act 1999 (NZ) -- Animal Welfare Act 2006 -- Animal Welfare Act of 1966 (USA) -- animal welfare domains -- animal welfare index.

animal welfare needs -- Animal Welfare (Zoos) Code of Welfare 2004 (NZ) -- animal wellness centre -- animal-assisted therapy -- Animalia -- Animals Act 1971 -- animals and religion -- Animals and Society Institute -- animals in film -- Animals (Scientific Procedures) Act 1986 -- Animals' VC -- anion -- ankus, bullhook -- Annelida -- Annex A species -- Annex B species -- Annex C species -- Annex D species -- annual plant -- annual stock list -- anoestrous, anestrous -- anoestrus, anestrus -- anogenital -- ANOVA -- anovulatory -- anoxic -- Anseriformes -- antagonistic -- Antarctic -- Antarctic Conservation Act of 1978 (USA) -- Antarctic region -- Antarctic Treaty 1959 -- antelope -- antennal gland, green gland -- anterior -- anterior pituitary -- anthelmintic -- anthrax -- Anthropocene -- anthropoid ape -- anthropology -- anthropomorphism -- anthrozoology -- Anthrozoös -- antiaphrodisiac -- antibiotics -- antibody, immunoglobulin -- anticoagulant -- anticodon -- antidiuretic -- antidote -- anti-emetic -- antifreeze -- antifungal -- antigen -- antihistamine -- anti-inflammatory -- antioxidant -- anti-predator behaviour -- antisepsis -- antiseptic -- antiseptic mat -- antiserum -- antivenene -- antivenin, antivenene -- anti-zoo group -- antler -- Anura -- anus -- anvil behaviour -- anxiety -- aorta -- apathy -- ape -- apex predator, alpha predator, super carnivore, super predator, top carnivore, top predator -- APHIS -- apiary, bee yard -- apnoea, apnea -- apocrine sweat gland -- Apodiformes -- aposematism -- apparent dry matter digestibility (ADMD) -- appeasement behaviour -- appendicitis -- appendicular skeleton -- appendix -- appetite -- appetitive behaviour -- approved vet, accredited vet -- aquaciser -- aquaculture -- aquaponics -- aquarist -- aquarium -- Aquarium for Wildlife Conservation -- aquascape -- aquatred -- Arab.

Arabian oryx (Oryx leucoryx).