Vol 10, Issue 2, May 2023

• Cover Page
• Inside Pages
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• Horses' Social Evaluation of Human Third-Party Interactions
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• Nursing Behavior in Sperm Whales (Physeter macrocephalus)
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• Detection of Water Flow by Japanese Eel (Anguilla japonica): Behavioral and Pharmacological Analyses
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• Wild Carrion Crows (Corvus corone) Autonomously Respond to Speech but Show No Difference in Their Response to a Local and a Foreign Language
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• Appropriate Knowledge of Wild Chimpanzee Behavior ('Know-What') and Field Experimental Protocols ('Know-How') are Essential Prerequisites for Testing the Origins and Spread of Technological Behavior
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