There is a strong disconnect between humans and other species in our societies. Zoos particularly expose this disconnect by displaying the asymmetry between visitors in search of entertainment, and animals often suffering from a lack of meaningful interactions and natural behaviors. In zoos, many species are unable to mate, raise young, or exhibit engagement behaviors. Enrichment is a way to enhance their quality of life, enabling them to express natural behaviors and reducing stereotypies. Prior work on sound-based enrichment and interactivity (...) suggest that a better understanding of animals’ sensory needs and giving them options to shape their surroundings can yield substantial benefits. However, current zoo management and conservation practices lack tools and frameworks to leverage innovative technology to improve animal well-being and zookeepers’ ability to care for them. Ethical considerations are called for in developing such interventions as human understanding of animals’ worlds is still limited, and assumptions can have detrimental consequences. Based on several interventions, four principles are proposed to guide a more systematic implementation of sonic enrichment in zoos. The goal is to lay the groundwork for the design of the zoos of the future, with a focus on sounds, for the benefit of the animals. (shrink)

Symbolic representation acquisition is the complex cognitive process consisting of learning to use a symbol to stand for something else. A variety of non-human animals can engage in symbolic representation learning. One particularly complex form of symbol representation is the associations between orthographic symbols and speech sounds, known as grapheme–phoneme correspondence. To date, there has been little evidence that animals can learn this form of symbolic representation. Here, we evaluated whether an Umbrella cockatoo (Cacatua alba) can learn letter-speech correspondence using (...) English words. The bird-participant was trained with phonics instruction and then tested on pairs of index cards while the experimenter spoke the word. The words were unknown to the bird and the experimenter was blinded to the correct card position. The cockatoo’s accuracy (M = 71%) was statistically significant. Further, we found a strong correlation between the bird’s word-identification success and the number of overlapping letters between words, where the more overlapping letters between words, the more likely the cockatoo answered incorrectly. Our results strongly suggest that parrots may have the ability to learn grapheme–phoneme correspondences. (shrink)

Cetaceans show high cognitive abilities and strong social bonds. Their primary sensory modality to communicate and sense the environment is acoustics. Research on their echolocation and social vocalizations typically uses visual and tactile systems adapted from research on primates or birds. Such research would benefit from a purely acoustic communication system to better match their natural capabilities. We argue that a full duplex system, in which signals can flow in both directions simultaneously is essential for communication research. We designed and (...) implemented a full duplex system to acoustically interact with cetaceans in the wild, featuring digital echo-suppression. We pilot tested the system in Arctic Norway and achieved an echo suppression of 18 dB. We discuss the limiting factors and how to improve the echo suppression further. The system enabled vocal interaction with the underwater acoustic scene by allowing experimenters to listen while producing sounds. We describe our motivations, then present our pilot deployment and give examples of initial explorative attempts to vocally interact with wild orcas and humpback whales. (shrink)