A systematic catalogue of the behaviours an animal performs, with definitions precise enough that different observers can reliably identify the same behaviours.

Ethograms are the foundation of behavioural research across species. They allow observations from different studies and different observers to be compared, because each behaviour is defined in operational terms that anyone can apply consistently. A well-constructed ethogram includes behaviours grouped by category, definitions that distinguish each behaviour from similar ones, and where possible, observable criteria that can be applied without requiring interpretation of the animal’s intent.

Modern ethograms have been developed for horses, dogs, cats, primates, marine mammals, and many other species. Some ethograms focus on the full behavioural repertoire of the species; others focus on specific behaviour categories (social behaviour, play behaviour, foraging behaviour) for particular research purposes. The choice of ethogram depends on the research question.

Building a useful ethogram requires careful observation and operational definition. A behaviour described loosely (for example, “the horse is calm”) is not measurable. The same behaviour described operationally (for example, “the horse stands with head lowered to the level of the withers or below, ears in neutral or pointing forward but not pinned, with no signs of muscle tension visible in the face or shoulders”) can be measured reliably across observers.

In applied animal behaviour work, ethograms are used for behavioural assessment, intervention design, and outcome measurement. A behavioural problem cannot be effectively addressed without first being precisely characterised, and ethograms provide the conceptual framework for that precision.

The ethogram concept also has applications in everyday animal handling. Handlers who can identify and name specific behaviours their animal performs are typically more accurate at predicting what comes next and at intervening early when something looks off. Learning the ethogram for one’s own species of interest is one of the most useful investments a serious handler can make.