Spatial and social behaviour are fundamental aspects of an animal's biology, and their
social and spatial environments are indelibly linked through mutual causes and shared …

Warder C. Allee brought attention to the possibility of a positive relationship between
aspects of fitness and population size 50 years ago. Until recently, however, this concept …

Social organisation in animals takes many forms. It includes assemblages of territorial
animals, dominance hierarchies and social groups, among other things. The basic tenet that …

Stupid models are extremely useful. They are useful because humans are boundedly
rational and because language is imprecise. Social psychology, and the social and …

Fish travel in schools, birds migrate in flocks, honeybees swarm, and ants build trails. How
and why do these collective behaviors occur? Exploring how coordinated group patterns …

The author shares some lessons learned from a lifetime of working with and thinking about
groups. Three types of groups are described, including the impact they have on the …

Allee effects are (broadly) defined as a decline in individual fitness at low population size or
density. They can result in critical population thresholds below which populations crash to …

Predators and food are the keys to understanding fish shoals; synchronised co-operation
defeats predators, and optimal food gathering in shoals reflects a shifting balance between …

Animals lead rich social lives. They care for one another, compete for resources, and mate.
Within a society, social relationships may be simple or complex and usually vary …

As a ripple of light the fish turn. Like some animate fluid, the school glides and turns again.
The synchrony of motion is captivating. A similar integration of behavior can be seen in a …