Vol 4, Issue 2, May 2017

• Cover Page
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• Inside Pages
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• Triadic Interations with Tools in a Gorilla
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• Does a Rival's Song Elicit Territorial Defense in a Tropical Songbird, the Pied Bush Chat (Saxicola caprata)?
  Navjeevan Dadwal and Dinesh Bhatt
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• Monitoring the Behavioral and Adrenal Activity of Giraffe (Giraffa camelopardalis) to Assess Welfare During Seasonal Housing Changes
  Catherine B. Razal, Jocelyn Bryant, and Lance J. Miller
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• Isolation Calls of the Bat Saccopteryx bilineata Encode Multiple Messages
  Ahana Aurora Fernandez and Mirjam Knörnschild
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• Zoo Foraging Ecology: Preference and Welfare Assessment of Two Okapi (Okapia johnstoni) at the Brookfield Zoo
  Sandra M. Troxell-Smith, Jason V. Watters, Christopher J. Whelan, and Joel S. Brown
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