红桃视频

In recent decades, corvids, such as crows, ravens, jays, and magpies, have become a key model group in animal cognition research. Their success across a wide range of ecological niches and social contexts has prompted research into the mechanisms and evolutionary pressures underlying their cognitive abilities. Corvids inhabit a vast range of environments, from arid deserts to urban landscapes, and exhibit diverse social structures, from territorial pairs to large, dynamic flocks. This talk synthesizes current findings on corvid cognition, focusing on how socio-ecological factors shape their remarkable learning and problem-solving abilities. Some species, such as New Caledonian crows, use and manufacture tools; others display innovative foraging strategies and exploit anthropogenic food sources. Importantly, corvids exhibit strong executive control, including delay of gratification, allowing them to plan, adapt, and navigate complex challenges. Vocal communication plays a central role in coordinating social interactions. As open-ended vocal learners, corvids can acquire and modify vocalisations throughout life, engage in vocal mimicry, and flexibly adjust their calls according to social and ecological context. These abilities facilitate the maintenance of social relationships, the transmission of information, and the coordination of group activities. In addition to species-level traits, corvids show substantial individual variation in cognitive performance. Studying these differences offers a powerful approach to understanding the evolutionary pressures acting on cognition. Together, these insights position corvids as a crucial comparative model for investigating the evolution of cognition across biological systems.

Dr Claudia Wascher

Anglia Ruskin University, UK

Dr Claudia Wascher

Anglia Ruskin University, UK

Professor Claudia Wascher is a behavioural biologist at Anglia Ruskin University whose research explores how sociality and ecology shape cognition and communication in animals. She is particularly known for her work on corvids, examining cognitive mechanisms such as delay of gratification and responses to inequity, as well as the causes of individual differences in cognitive performance.

Her research also takes a broader comparative perspective, investigating the evolution of behaviours such as caching and vocal mimicry in corvids.

Claudia is also interested in addressing biases in animal behaviour research, such as how conceptual, geographic, taxonomic and historical biases shape our understanding of animal cognition.

For centuries, from Robert Hooke’s Micrographia to the ideas of Charles Darwin and Sigmund Exner, insect compound eyes have been viewed as fundamentally limited by their fixed, faceted structure, producing a coarse, pixel-like representation of the world. Our new work challenges this long-standing assumption. We show that insect vision is not static, but dynamically shaped by movement: both the animal’s rapid saccadic turns and microscopic movements within the eye itself actively enhance what is seen.

When insects move, their eyes do not simply record images; they actively sample the world in bursts. These rapid shifts, combined with the physics of light detection in thousands of tiny photoreceptive units, generate especially strong and precisely timed signals. At the first synapse in the visual system, this gives rise to a striking effect that we term synaptic high-frequency jumping: the neural signal is reshaped to carry much faster fluctuations than previously thought possible, effectively boosting temporal resolution while minimising delay. In essence, motion transforms the visual system into a high-speed encoder.

This mechanism helps explain how insects achieve hyperacute vision, resolving fine detail far beyond what their eye structure alone would predict, while reacting on millisecond timescales during flight. More broadly, these findings point to a new principle of neural computation: perception emerges from tightly coupled dynamics between behaviour and neural processing. Rather than passively filtering inputs, the brain actively structures them in time, suggesting new ways to think about both biological and artificial vision.

Professor Mikko Juusola

University of Sheffield, UK

Professor Mikko Juusola

University of Sheffield, UK

Professor Mikko Juusola is Professor of Systems Neuroscience at the University of Sheffield. He received his MD in General Medicine and PhD in Neurophysiology from the University of Oulu, Finland, in 1993, where he was appointed Docent of Neurophysiology in 1995. His career has included fellowships and research positions at the Universities of Alberta, Dalhousie, Cambridge and Sheffield, including Royal Society University Research Fellow appointments at Cambridge and Sheffield. He was also Visiting Professor and Principal Investigator at the State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, China.

Professor Juusola studies how animals sense, recall, think and behave, focusing particularly on information processing in the eye and brain circuits of Drosophila. His laboratory combines in vivo electrophysiology, two-photon imaging, genetics, mathematical analysis, biophysical modelling and behavioural studies.

Understanding how intelligence emerges from biological systems requires linking neural architecture to molecular networks and behaviour. The nematode Caenorhabditis elegans provides a powerful platform to do this: its complete connectome is known, it offers exceptional genetic tractability, and its transparency enables whole-animal, high-resolution optical methods, including optogenetics and calcium imaging. I will describe how these features support studies of behavioural plasticity through three examples.

First, we examined how neuromodulatory signalling interacts with synaptic connectivity to shape behavioural states. Using behaviour tracking, optogenetics, and calcium imaging, we identified a two-step neuropeptide pathway linking mechanosensation to arousal and nociceptor sensitisation, showing how extrasynaptic signals expand circuit function.

Second, we showed that sexually dimorphic behaviours arise by repurposing shared transmitters. Sex-specific expression of the neuropeptide LURY-1 tunes prioritisation between feeding and reproduction in males and hermaphrodite sexes, illustrating state-dependent modulation of behaviour.

Finally, our recent work innovated on a proximity-labelling strategy to map protein-level changes during learning within neurons. Our approach captured conserved signalling pathways alongside novel regulators, supporting the idea that memory emerges from a minimal, evolutionarily conserved molecular network. Our next studies seek to profile these protein-level changes at the level of defined neurons and subcellular localisations.

Together, these studies illustrate how C. elegans enables the interrogation of multiple layers of systems neuroscience within the same model – from molecules to circuits to behaviour – dissecting causality and revealing principles of adaptive intelligence that may be relevant to both biological and artificial systems.

Dr Yee Lian Chew

Flinders Health and Medical Research Institute, Australia

Dr Yee Lian Chew

Flinders Health and Medical Research Institute, Australia

Dr Yee Lian Chew is an Associate Professor in Physiology (NHMRC Emerging Leadership Fellow) at Flinders University. Her research uses the model organism Caenorhabditis elegans to investigate how neural circuits encode learning and memory, with the goal of identifying pathways relevant to neurological conditions such as chronic pain and neurodegeneration. She completed her BSc and PhD at the University of Sydney before undertaking postdoctoral research at the MRC Laboratory of Molecular Biology, Cambridge. She returned to Australia in 2019 to establish her independent research program, and now leads a team at Flinders, funded by the Australian Research Council and National Health & Medical Research Council of Australia. Dr Chew is an active science communicator (Tall Poppy 2021, Superstars of STEM 2021-22) and advocate for equity, diversity and inclusion in academia.