Woodpigeons nesting in association with hobby falcons: advantages and choice rules

Article Abstract:

A study was conducted to investigate why a number of bird species nest in association with more aggressive birds. This behavior is observed in woodpigeons, Columba palumbus, that build their nests close to those of the hobby falcons, Falco subbuteo. Results of the study show that woodpigeons consider the hobby falcons their protective umbrella against nest predators. Being in close proximity, however, woodpigeons are also at risk as falcons are known to prey on adult woodpigeons.

Social aspects, Birds, Pigeons, Nest building, Animal psychology, Falcons

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Spatial benefits afforded by high rank in white-faced capuchins

Article Abstract:

A study was conducted on two social groups of white-faced capuchins to determine the effects of dominance rank on the use of spatial positions. Data on foraging behavior patterns were gathered using the focal animal continuous sampling method. Results showed that individuals with a high dominance rank spend less time on the edge of the group, particularly when food is abundant. They only position themselves in front and back of the group when food source is low.

Monkeys, Herding (Animal behavior), Herding behavior in animals

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Assessing the degree of association in groups of animals using the concept of entropy

Article Abstract:

A method for studying the degree of association or segregation between groups of animals is proposed, based on the concept of entropy. The method was applied to lambs from two different flocks to determine if they remain separated as groups when penned together. The results support the notion that groups of lambs stay separate for up to two days when penned together.

Usage, Entropy (Information theory)

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