Hierarchical group dynamics in pigeon flocks

  title={Hierarchical group dynamics in pigeon flocks},
  author={M{\'a}t{\'e} Nagy and Zsuzsa {\'A}kos and Dora Biro and Tam{\'a}s Vicsek},
Animals that travel together in groups display a variety of fascinating motion patterns thought to be the result of delicate local interactions among group members. Although the most informative way of investigating and interpreting collective movement phenomena would be afforded by the collection of high-resolution spatiotemporal data from moving individuals, such data are scarce and are virtually non-existent for long-distance group motion within a natural setting because of the associated… 

Deciphering Interactions in Moving Animal Groups

Using video tracks of fish shoal in a tank, it is shown how a careful, incremental analysis at the local scale allows for the determination of the stimulus/response function governing an individual's moving decisions, yielding a novel schooling model whose parameters are all estimated from data.

Interaction rules underlying group decisions in homing pigeons

The interactions between pigeons stabilize a side-by-side configuration, promoting bidirectional information transfer and reducing the risk of separation, and it is shown that if one bird gets in front it will lead directional choices, and that a faster bird will fly slightly in front and thus dominate the choice of homing route.

Robustness of flight leadership relations in pigeons

Intermittence and connectivity of interactions in pigeon flock flights

It is found that pigeon flocks employ an intermittent interaction (alignment) mechanism, where intra-group information transmission is not required at every instant, however, the union of the topologies of several consecutive interaction networks always keeps connected.

Dynamical coupling during collective animal motion

It is argued that applying an information-theoretic perspective to the study of coordinated phenomena in animal groups will eventually help to understand cause and effect in collective behaviour.

Switching hierarchical leadership in coordinated movement of pigeon flocks

By the assistance of the high-resolution GPS data of homing flight pigeon flocks, an explicit switching hierarchical mechanism is proposed and a pigeon flock has a long-term positional leader for smooth moving trajectories, whereas the leadership passes to a tentative one upon sudden turns or zigzags.

Examination of an averaging method for estimating repulsion and attraction interactions in moving groups

It is suggested that an averaging method can capture the qualitative features of underlying interactions from trajectory data alone, including repulsion and attraction effects evident in changes in speed and direction of motion, and the presence of a blind zone.

Emergence of splits and collective turns in pigeon flocks under predation

This study studies airborne flocks of homing pigeons attacked by a robotic falcon, combining empirical data with a species-specific computational model of collective escape to identify two new patterns of collective Escape: early splits and collective turns, occurring even at large distances from the predator.



Organized flight in birds

Interaction ruling animal collective behavior depends on topological rather than metric distance: Evidence from a field study

It is argued that a topological interaction is indispensable to maintain a flock's cohesion against the large density changes caused by external perturbations, typically predation, and supported by numerical simulations.

Modelling Group Navigation: Dominance and Democracy in Homing Pigeons

During group navigation the information shared by group members may be complex, heterogeneous and may vary over time. Nevertheless, modelling approaches have demonstrated that even relatively simple

Spontaneous emergence of leaders and followers in foraging pairs

A state-dependent, dynamic game model of foraging by a pair of animals, in which each individual chooses between resting or foraging during a series of consecutive periods, so as to maximize its own individual chances of survival.

Dynamics of fish shoals: identifying key decision rules

By tracking the movements of individual fish over time, this work finds evidence for both attraction and repulsion zones in fish shoaling, and three other novel features emerge as well.

Flocks, herds and schools: A distributed behavioral model

This paper explores an approach based on simulation as an alternative to scripting the paths of each bird individually, an elaboration of a particle systems, with the simulated birds being the particles.

Organization of Group Members at Departure Is Driven by Social Structure in Macaca

The way the macaques joined a movement reflected the social differences between the species in terms of dominance and kinship and rhesus macaques preferred to join high-ranking or related individuals, whereas Tonkean macaques based associations during joining mostly on sexual relationships with a subgroup of peripheral males.