Aerobiology
- International Association for Aerobiology - IAA

Algology
- International Phycological Society (Algology)

Arachnology
- International Society of Arachnology - ISA

Bee Research
- International Bee Research Association - IBRA
- International Commission for Plant-Bee Relationships
- ICPBR

Biochemistry
- International Association for Comparative Physiology
and Biochemistry

Bioindicators
- Interdisciplinary Commission on Bioindicators - ICB

Biometeorology
- International Society of Biometeorology - ISB

Biometry
- International Biometric Society - IBS

Botany / Mycology (see also "search term" : Nomenclature)
- International Mycological Association - IMA
- International Association of Botanic and Mycological Societies - IABMS
- International Association of Botanic Gardens - IABG
- International Society of Environmetnal Botanists - ISEB

Cell Biology
- International Federation for Cell Biology - IFCB

Coleopterologia
- Asociacion Europea de Coleopterologia

Biological Control
- International Organisation for Biological Control - IOBC

Culture Collections
- World Federation for Culture Collections - WFCC

Developmental Biology
- International Society of Developmental Biologists - ISDB

Dipterology
- International Congresses of Dipterology

Ecology
- International Association for Ecology
- International Committee on Microbial Ecology

Science Editing
- European Association of Science Editing - EASE

Biological Education
- IUBS Commission on Biological Education - CBE

Endocrinology
- European Society for Comparative Endocrinology

Entomology
- International Congresses of Entomology

Environmental Mutagens
- International Association of Environmental Mutagen Societies

Ethology
- International Ethological Committee

Systematic and Evolutionary Biology
- International Organization of Systematic and Evolutionary Biology - IOSEB

Fungi
- International Commission on the Taxonomy of Fungi
- International Society for Mushroom Science

Genetics
- International Genetics Federation - IGF
- International Society for Animal Genetics

Herpetology
- World Congress of Herpetology

Histochemistry/Cytochemistry
- International Federation of Societies for Histochemistry
and Cytochemistry

Horticulture
- International Society for Horticultural Science - ISHS

Human Biology
- International Association of Human Biologists - IAHB

Immunology
- International Society for Developmental
and Comparative Immunology

Invertebrates
- Society for Invertebrate Pathology - SIP
- International Society of Invertebrate Reproduction
and Development
- International Commission for Invertebrate Survey

Lichenology
- International Association for Lichenology

Limnology
- Societas Internationalis Limnologiae

Malacology
- Unitas Malacologica

Mammalogy
- Interational Federation of Mammalogists

Mycology
- International Mycological Association - IMA
- International Association of Botanic and Mycological Societies
- IABMS

Nematology
- European Society of Nematologists

Botanical Nomenclature
- General Committee on Botanical Nomenclature
- International Commission for the Nomenclature
of Cultivated Plants

Oceanography
- International Association for Biological Oceanography - IABO

Ornithology
- International Ornithological Committee
- XXIII. International Ornithological Congress

Palaeontology
- International Palaeontological Association

Paleobotany
- International Organisation of Paleobotany

Palynology
- International Federation of Palynological Societies

Parasitology
- World Federation of Parasitologists

Photobiology
- International Union of Photobiology

Phycology
- International Phycological Society (Algology)

Physiology
- International Congress on Comparative Physiology
and Biochemistry
- International Association of Plant Physiology - IAPP

Plants
- International Commission for the Nomenclature
of Cultivated Plants
- International Organization for Plant Information - IOPI
- International Council for Medicinal and Aromatic Plants - ICMAP
- International Society for Plant Pathology
- International Association of Plant Physiology - IAPP
- International Association for the Plant Protection Sciences - IAPPS
- International Association of Sexual Plant Reproduction Research - IASPRR
- International Organization for Succulent Plant Study - IOS
- International Association of Plant Taxonomy - IAPT

Polychaetology
- International Polychaetological Association

Primatology
- International Primatological Association

Radiation Research
- International Association for Radiation Research

Reticuloendothelium
- International Union of Reticuloendothelial Societies

Seed Testing
- International Seed Testing Association

Skin Biology
- European Society for Comparative Skin Biology

Social Insects
- International Union for the Study of Social Insects

Taxonomy
- International Working Group on Taxonomic Databases - TDWG
- International Commission on the Taxonomy of Fungi
- Organization for the Phyto-Taxonomic Investigation of the Mediterranean Area - OPTIMA
- International Association of Plant Taxonomy

Tropical Root Crops
- International Society for Tropical Root Crops

Vegetation
- International Commission on Small Scale Vegetation Mapping
- International Association for Vegetation Science - IAVS

Vertebrate Morphology
- International Society of Vertebrate Morphologists

Zoology
- International Bryozoology Association
- International Union of Protozoology Societies
- International Commission of Soil Zoology
- International Commission on Zoological Nomenclature - ICZN
- International Congress of Zoology - ICZ