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We tracked the head and thorax of bumblebees freely flying in a tunnel containing vertically oriented obstacles to uncover the sensorimotor strategies used for obstacle detection and collision avoidance. Bumblebees presented all the characteristics of active vision during flight by stabilizing their head relative to the external environment and maintained close alignment between their gaze and flightpath. Head stabilization increased motion contrast of nearby features against the background to enable obstacle detection. As bees approached obstacles, they appeared to modulate avoidance responses based on the relative retinal expansion velocity (RREV) of obstacles and their maximum evasion acceleration was linearly related to RREVmax. Finally, bees prevented collisions through rapid roll manoeuvres implemented by their thorax. Overall, the combination of visuo-motor strategies of bumblebees highlights elegant solutions developed by insects for visually guided flight through cluttered environments.<\/jats:p>","DOI":"10.1242\/jeb.243021","type":"journal-article","created":{"date-parts":[[2022,1,24]],"date-time":"2022-01-24T09:35:20Z","timestamp":1643016920000},"source":"Crossref","is-referenced-by-count":30,"title":["Bumblebees display characteristics of active vision during robust obstacle avoidance flight"],"prefix":"10.1242","volume":"225","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7397-9713","authenticated-orcid":false,"given":"Sridhar","family":"Ravi","sequence":"first","affiliation":[{"name":"Bielefeld University 1 Department of Neurobiology and Center of Excellence Cognitive Interaction Technology (CITEC) , , 33619 Bielefeld , Germany"},{"name":"School of Engineering and Information Technology, University of New South Wales 2 , Canberra, ACT 2600 , Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tim","family":"Siesenop","sequence":"additional","affiliation":[{"name":"Bielefeld University 1 Department of Neurobiology and Center of Excellence Cognitive Interaction Technology (CITEC) , , 33619 Bielefeld , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0889-4550","authenticated-orcid":false,"given":"Olivier J.","family":"Bertrand","sequence":"additional","affiliation":[{"name":"Bielefeld University 1 Department of Neurobiology and Center of Excellence Cognitive Interaction Technology (CITEC) , , 33619 Bielefeld , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liang","family":"Li","sequence":"additional","affiliation":[{"name":"Max Planck Institute of Animal Behavior 3 Department of Collective Behavior , , , 78464 Konstanz , Germany"},{"name":"University of Konstanz 3 Department of Collective Behavior , , , 78464 Konstanz , Germany"},{"name":"Centre for the Advanced Study of Collective Behaviour, University of Konstanz 4 , 78464 Konstanz , Germany"},{"name":"Department of Biology, University of Konstanz 5 , 78464 Konstanz , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlotte","family":"Doussot","sequence":"additional","affiliation":[{"name":"Bielefeld University 1 Department of Neurobiology and Center of Excellence Cognitive Interaction Technology (CITEC) , , 33619 Bielefeld , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Fisher","sequence":"additional","affiliation":[{"name":"School of Engineering, RMIT University 6 , Melbourne, VIC 3001 , Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William H.","family":"Warren","sequence":"additional","affiliation":[{"name":"Brown University 7 Department of Cognitive, Linguistic & Psychological Sciences , , Providence, RI 02912 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Egelhaaf","sequence":"additional","affiliation":[{"name":"Bielefeld University 1 Department of Neurobiology and Center of Excellence Cognitive Interaction Technology (CITEC) , , 33619 Bielefeld , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","published-online":{"date-parts":[[2022,2,18]]},"reference":[{"key":"2023011309043478400_JEB243021C1","doi-asserted-by":"publisher","first-page":"869","DOI":"10.1007\/s00359-012-0757-7","article-title":"Visual flight control in naturalistic and artificial environments","volume":"198","author":"Baird","year":"2012","journal-title":"J. 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