Vol 1, Issue 2, May 2014

• Cover Page
• Inside Pages
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• A Brief Glimpse at the Long Evolutionary History of Play
  Gordon M. Burghardt
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• Play, Playfulness, Creativity and Innovation
  Patrick Bateson
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• Why do Dolphins Play?
  Stan A. Kuczaj II and Holli C. Eskelinen
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• One Good Turn Deserves Another: Combat versus Other Functions of Acrobatic Maneuvers in the Play Fighting of Vervet Monkeys (Chlorocebus aethiops)
  Sergio M. Pellis, Vivien C. Pellis, Louise Barrett, and S. Peter Henzi
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• African Elephant Play, Competence and Social Complexity
  Phyllis C. Lee and Cynthia J. Moss
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• An Exploration of Play Behaviors in Raven Nestlings
  Mathias Osvath, Helena Osvath, and Rasmus Bååth
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• Adults Play but Not Like Their Young: The Frequency and Types of Play by Belugas (Delphinapterus leucas) in Human Care
  Heather Hill and Domonique Ramirez
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• Nosing Around: Play in Pigs
  Kristina Horback
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• Sub-adult Ravens Synchronize their Play: A Case of Emotional Contagion?
  Mathias Osvath and Miriam Sima
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• Beluga (Delphinapterus leucas) Novel Bubble Helix Play Behavior
  Brittany L. Jones and Stan A. Kuczaj II
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