36 Publikationen
2017 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2914943
PUB | DOI | WoS | PubMed | Europe PMC
Ibbotson, M. R., Hung, Y. - S., Meffin, H., Boeddeker, N., & Srinivasan, M. V. (2017). Neural basis of forward flight control and landing in honeybees. Scientific Reports, 7(1), 14591. doi:10.1038/s41598-017-14954-0
2017 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2912693
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Jetzschke, S., Fröhlich, J., Ernst, M. O., & Boeddeker, N. (2017). Finding home. Landmark ambiguity in human navigation. Frontiers in Behavioural Neuroscience, 11, 132. doi:10.3389/fnbeh.2017.00132
2017 | Kurzbeitrag Konferenz / Poster | PUB-ID: 2912692
PUB
Jetzschke, S., Boeddeker, N., & Ernst, M. O. (2017). Finding Home: Cue integration and prior knowledge. Presented at the VSS 2017, TradeWinds Island Resorts, St. Pete Beach, Florida.
2016 | Konferenzbeitrag | PUB-ID: 2906445
PUB
Fröhlich, J., Jetzschke, S., Boeddeker, N., & Ernst, M. O. (2016). Entwicklung und Einsatz eines interaktiven Bewegungssimulators. Presented at the 13. Workshop Virtuelle und Erweiterte Realität, Bielefeld.
2016 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2901066
PUB | DOI | WoS | PubMed | Europe PMC
Stürzl, W., Zeil, J., Boeddeker, N., & Hemmi, J. M. (2016). How Wasps Acquire and Use Views for Homing. Current Biology, 26(4), 470-482. doi:10.1016/j.cub.2015.12.052
2016 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2900902
PUB | DOI | WoS | PubMed | Europe PMC
Jetzschke, S., Ernst, M. O., Moscatelli, A., & Boeddeker, N. (2016). Going round the bend: persistent personal biases in walked angles. Neuroscience Letters, 617, 72-75. doi:10.1016/j.neulet.2016.01.026
2015 | Datenpublikation | PUB-ID: 2763686
PUB
| Dateien verfügbar | DOI

Boeddeker, N., Mertes, M., Dittmar, L., & Egelhaaf, M. (2015). Data set: Head movements in bumblebees. Bielefeld University. doi:10.4119/unibi/2763686
2015 | Kurzbeitrag Konferenz / Poster | Im Druck | PUB-ID: 2756749
PUB
Jetzschke, S., Böddeker, N., & Ernst, M. O. (In Press). Uncertainty in navigation: Optimal integration of landmark and proprioceptive information?. Presented at the IMRF 2015, Pisa.
2014 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2701723
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Mertes, M., Dittmar, L., Egelhaaf, M., & Boeddeker, N. (2014). Visual motion-sensitive neurons in the bumblebee brain convey information about landmarks during a navigational task. Frontiers in Behavioral Neuroscience, 8, 335. doi:10.3389/fnbeh.2014.00335
2014 | Sammelwerksbeitrag | Veröffentlicht | PUB-ID: 2717733
PUB | DOI
Samet, N., Zeil, J., Mair, E., Boeddeker, N., & Stürzl, W. (2014). Ground-Nesting Insects Could Use Visual Tracking for Monitoring Nest Position during Learning Flights. In A. P. del Pobil, E. Chinellato, E. Martinez-Martin, J. Hallam, E. Cervera, & A. Morales (Eds.), Lecture Notes in Computer Science: Vol. 8575. From Animals to Animats 13 (pp. 108-120). Cham: Springer International Publishing. doi:10.1007/978-3-319-08864-8_11
2013 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2641853
PUB | DOI | WoS | PubMed | Europe PMC
Baird, E., Boeddeker, N., Ibbotson, M. R., & Srinivasan, M. V. (2013). A universal strategy for visually guided landing. Proceedings Of The National Academy Of Sciences, 110(46), 18686-18691. doi:10.1073/pnas.1314311110
2012 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2550590
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Egelhaaf, M., Boeddeker, N., Kern, R., Kurtz, R., & Lindemann, J. P. (2012). Spatial vision in insects is facilitated by shaping the dynamics of visual input through behavioral action. Frontiers in Neural Circuits, 6, 108. doi:10.3389/fncir.2012.00108
2012 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2461299
PUB
| PDF | DOI | Download (ext.) | WoS | PubMed | Europe PMC

Braun, E., Dittmar, L., Böddeker, N., & Egelhaaf, M. (2012). Prototypical Components of Honeybee Homing Flight Behavior Depend on the Visual Appearance of Objects Surrounding the Goal. Frontiers in Behavioral Neuroscience, 6(January), 1-16. doi:10.3389/fnbeh.2012.00001
2012 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2517895
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Kern, R., Boeddeker, N., Dittmar, L., & Egelhaaf, M. (2012). Blowfly flight characteristics are shaped by environmental features and controlled by optic flow information. Journal of Experimental Biology, 215(14), 2501-2514. doi:10.1242/jeb.061713
2011 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2049712
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Dittmar, L., Egelhaaf, M., Stürzl, W., & Böddeker, N. (2011). The behavioural relevance of landmark texture for honeybee homing. Frontiers in Behavioral Neuroscience, 5(5), 20. doi:10.3389/fnbeh.2011.00020
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1795945
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., Dittmar, L., Stürzl, W., & Egelhaaf, M. (2010). The fine structure of honeybee head and body yaw movements in a homing task. Proceedings of the Royal Society B - Biological Sciences, 277(1689), 1899-1906. doi:10.1098/rspb.2009.2326
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1796503
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., & Hemmi, J. M. (2010). Visual gaze control during peering flight manoeuvres in honeybees. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 277(1685), 1209-1217. doi:10.1098/rspb.2009.1928
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1794317
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Dittmar, L., Stürzl, W., Baird, E., Böddeker, N., & Egelhaaf, M. (2010). Goal seeking in honeybees: matching of optic flow snapshots? Journal of Experimental Biology, 213(17), 2913-2923. doi:10.1242/jeb.043737
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1930189
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Stürzl, W., Böddeker, N., Dittmar, L., & Egelhaaf, M. (2010). Mimicking honeybee eyes with a 280 degrees field of view catadioptric imaging system. Bioinspiration & Biomimetics, 5(3), 36002. doi:10.1088/1748-3182/5/3/036002
2009 | Sammelwerksbeitrag | Veröffentlicht | PUB-ID: 1948901
PUB
| PDF | DOI

Zeil, J., Böddeker, N., & Stürzl, W. (2009). Visual Homing in Insects and Robots. In D. Floreano, J. - C. Zufferey, M. V. Srinivasan, & C. Ellington (Eds.), Flying Insects and Robots (pp. 87-99). Berlin: Springer. doi:10.1007/978-3-540-89393-6_7
2008 | Konferenzbeitrag | Veröffentlicht | PUB-ID: 1998472
PUB
| PDF

Stürzl, W., Dittmar, L., Böddeker, N., & Egelhaaf, M. (2008). Probing navigation strategies of honey-bees - landmark experiments and simulations. ECCV Workshop on "Vision in Action: Efficient strategies for cognitive agents in complex environments"
2008 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1942351
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Stürzl, W., Soccol, D., Zeil, J., Böddeker, N., & Srinivasan, M. V. (2008). Rugged, obstruction-free, mirror-lens combination for panoramic imaging. Applied Optics, 47(32), 6070. doi:10.1364/AO.47.006070
2008 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1942367
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Letzkus, P. ,, Böddeker, N., Wood, J. T. ,, Zhang, S. - W. ,, & Srinivasan, M. V. , (2008). Lateralization of visual learning in the honeybee. Biology letters, 4(1), 16-19. doi:10.1098/rsbl.2007.0466
2007 | Sammelwerksbeitrag | Veröffentlicht | PUB-ID: 1948951
PUB
Zeil, J., Boeddeker, N., Hemmi, J. M., & Stürzl, W. (2007). Going wild: Toward an ecology of visual information processing. In G. North & R. J. Greenspan (Eds.), Cold Spring Harbor monograph series, 49. Invertebrate Neurobiology (p. 381). Cold Spring Harbor, NY: Cold Spring Harbor Laboratory Press.
2007 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1593872
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Trischler, C., Böddeker, N., & Egelhaaf, M. (2007). Characterisation of a blowfly male-specific neuron using behaviourally generated visual stimuli. Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology, 193(5), 559-572. doi:10.1007/s00359-007-0212-3
2005 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1601049
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., Lindemann, J. P., Egelhaaf, M., & Zeil, J. (2005). Responses of blowfly motion-sensitive neurons to reconstructed optic flow along outdoor flight paths. J Comp Physiol A Neuroethol Sens Neural Behav Physiol, 191(12), 1143-1155. doi:10.1007/s00359-005-0038-9
2003 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1773528
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Egelhaaf, M., Böddeker, N., Kern, R., Kretzberg, J., Lindemann, J. P., & Warzecha, A. - K. (2003). Visually guided orientation in flies: case studies in computational neuroethology. Journal of comparative physiology , A: Neuroethology, sensory, neural, and behavioral physiology, 189(6), 401-409. doi:10.1007/s00359-003-0421-3
2003 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1773392
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., & Egelhaaf, M. (2003). Steering a virtual blowfly: simulation of visual pursuit. Proceedings of the Royal Society B, Biological sciences, 270(1527), 1971-1978. doi:10.1098/rspb.2003.2463
2003 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1773398
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., Kern, R., & Egelhaaf, M. (2003). Chasing a dummy target: smooth pursuit and velocity control in male blowflies. Proceedings of the Royal Society B, Biological sciences, 270(1513), 393-399. doi:10.1098/rspb.2002.2240
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36 Publikationen
2017 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2914943
PUB | DOI | WoS | PubMed | Europe PMC
Ibbotson, M. R., Hung, Y. - S., Meffin, H., Boeddeker, N., & Srinivasan, M. V. (2017). Neural basis of forward flight control and landing in honeybees. Scientific Reports, 7(1), 14591. doi:10.1038/s41598-017-14954-0
2017 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2912693
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Jetzschke, S., Fröhlich, J., Ernst, M. O., & Boeddeker, N. (2017). Finding home. Landmark ambiguity in human navigation. Frontiers in Behavioural Neuroscience, 11, 132. doi:10.3389/fnbeh.2017.00132
2017 | Kurzbeitrag Konferenz / Poster | PUB-ID: 2912692
PUB
Jetzschke, S., Boeddeker, N., & Ernst, M. O. (2017). Finding Home: Cue integration and prior knowledge. Presented at the VSS 2017, TradeWinds Island Resorts, St. Pete Beach, Florida.
2016 | Konferenzbeitrag | PUB-ID: 2906445
PUB
Fröhlich, J., Jetzschke, S., Boeddeker, N., & Ernst, M. O. (2016). Entwicklung und Einsatz eines interaktiven Bewegungssimulators. Presented at the 13. Workshop Virtuelle und Erweiterte Realität, Bielefeld.
2016 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2901066
PUB | DOI | WoS | PubMed | Europe PMC
Stürzl, W., Zeil, J., Boeddeker, N., & Hemmi, J. M. (2016). How Wasps Acquire and Use Views for Homing. Current Biology, 26(4), 470-482. doi:10.1016/j.cub.2015.12.052
2016 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2900902
PUB | DOI | WoS | PubMed | Europe PMC
Jetzschke, S., Ernst, M. O., Moscatelli, A., & Boeddeker, N. (2016). Going round the bend: persistent personal biases in walked angles. Neuroscience Letters, 617, 72-75. doi:10.1016/j.neulet.2016.01.026
2015 | Datenpublikation | PUB-ID: 2763686
PUB
| Dateien verfügbar | DOI

Boeddeker, N., Mertes, M., Dittmar, L., & Egelhaaf, M. (2015). Data set: Head movements in bumblebees. Bielefeld University. doi:10.4119/unibi/2763686
2015 | Kurzbeitrag Konferenz / Poster | Im Druck | PUB-ID: 2756749
PUB
Jetzschke, S., Böddeker, N., & Ernst, M. O. (In Press). Uncertainty in navigation: Optimal integration of landmark and proprioceptive information?. Presented at the IMRF 2015, Pisa.
2014 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2701723
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Mertes, M., Dittmar, L., Egelhaaf, M., & Boeddeker, N. (2014). Visual motion-sensitive neurons in the bumblebee brain convey information about landmarks during a navigational task. Frontiers in Behavioral Neuroscience, 8, 335. doi:10.3389/fnbeh.2014.00335
2014 | Sammelwerksbeitrag | Veröffentlicht | PUB-ID: 2717733
PUB | DOI
Samet, N., Zeil, J., Mair, E., Boeddeker, N., & Stürzl, W. (2014). Ground-Nesting Insects Could Use Visual Tracking for Monitoring Nest Position during Learning Flights. In A. P. del Pobil, E. Chinellato, E. Martinez-Martin, J. Hallam, E. Cervera, & A. Morales (Eds.), Lecture Notes in Computer Science: Vol. 8575. From Animals to Animats 13 (pp. 108-120). Cham: Springer International Publishing. doi:10.1007/978-3-319-08864-8_11
2013 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2641853
PUB | DOI | WoS | PubMed | Europe PMC
Baird, E., Boeddeker, N., Ibbotson, M. R., & Srinivasan, M. V. (2013). A universal strategy for visually guided landing. Proceedings Of The National Academy Of Sciences, 110(46), 18686-18691. doi:10.1073/pnas.1314311110
2012 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2550590
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Egelhaaf, M., Boeddeker, N., Kern, R., Kurtz, R., & Lindemann, J. P. (2012). Spatial vision in insects is facilitated by shaping the dynamics of visual input through behavioral action. Frontiers in Neural Circuits, 6, 108. doi:10.3389/fncir.2012.00108
2012 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2461299
PUB
| PDF | DOI | Download (ext.) | WoS | PubMed | Europe PMC

Braun, E., Dittmar, L., Böddeker, N., & Egelhaaf, M. (2012). Prototypical Components of Honeybee Homing Flight Behavior Depend on the Visual Appearance of Objects Surrounding the Goal. Frontiers in Behavioral Neuroscience, 6(January), 1-16. doi:10.3389/fnbeh.2012.00001
2012 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2517895
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Kern, R., Boeddeker, N., Dittmar, L., & Egelhaaf, M. (2012). Blowfly flight characteristics are shaped by environmental features and controlled by optic flow information. Journal of Experimental Biology, 215(14), 2501-2514. doi:10.1242/jeb.061713
2011 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 2049712
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Dittmar, L., Egelhaaf, M., Stürzl, W., & Böddeker, N. (2011). The behavioural relevance of landmark texture for honeybee homing. Frontiers in Behavioral Neuroscience, 5(5), 20. doi:10.3389/fnbeh.2011.00020
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1795945
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., Dittmar, L., Stürzl, W., & Egelhaaf, M. (2010). The fine structure of honeybee head and body yaw movements in a homing task. Proceedings of the Royal Society B - Biological Sciences, 277(1689), 1899-1906. doi:10.1098/rspb.2009.2326
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1796503
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., & Hemmi, J. M. (2010). Visual gaze control during peering flight manoeuvres in honeybees. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 277(1685), 1209-1217. doi:10.1098/rspb.2009.1928
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1794317
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Dittmar, L., Stürzl, W., Baird, E., Böddeker, N., & Egelhaaf, M. (2010). Goal seeking in honeybees: matching of optic flow snapshots? Journal of Experimental Biology, 213(17), 2913-2923. doi:10.1242/jeb.043737
2010 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1930189
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Stürzl, W., Böddeker, N., Dittmar, L., & Egelhaaf, M. (2010). Mimicking honeybee eyes with a 280 degrees field of view catadioptric imaging system. Bioinspiration & Biomimetics, 5(3), 36002. doi:10.1088/1748-3182/5/3/036002
2009 | Sammelwerksbeitrag | Veröffentlicht | PUB-ID: 1948901
PUB
| PDF | DOI

Zeil, J., Böddeker, N., & Stürzl, W. (2009). Visual Homing in Insects and Robots. In D. Floreano, J. - C. Zufferey, M. V. Srinivasan, & C. Ellington (Eds.), Flying Insects and Robots (pp. 87-99). Berlin: Springer. doi:10.1007/978-3-540-89393-6_7
2008 | Konferenzbeitrag | Veröffentlicht | PUB-ID: 1998472
PUB
| PDF

Stürzl, W., Dittmar, L., Böddeker, N., & Egelhaaf, M. (2008). Probing navigation strategies of honey-bees - landmark experiments and simulations. ECCV Workshop on "Vision in Action: Efficient strategies for cognitive agents in complex environments"
2008 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1942351
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Stürzl, W., Soccol, D., Zeil, J., Böddeker, N., & Srinivasan, M. V. (2008). Rugged, obstruction-free, mirror-lens combination for panoramic imaging. Applied Optics, 47(32), 6070. doi:10.1364/AO.47.006070
2008 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1942367
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Letzkus, P. ,, Böddeker, N., Wood, J. T. ,, Zhang, S. - W. ,, & Srinivasan, M. V. , (2008). Lateralization of visual learning in the honeybee. Biology letters, 4(1), 16-19. doi:10.1098/rsbl.2007.0466
2007 | Sammelwerksbeitrag | Veröffentlicht | PUB-ID: 1948951
PUB
Zeil, J., Boeddeker, N., Hemmi, J. M., & Stürzl, W. (2007). Going wild: Toward an ecology of visual information processing. In G. North & R. J. Greenspan (Eds.), Cold Spring Harbor monograph series, 49. Invertebrate Neurobiology (p. 381). Cold Spring Harbor, NY: Cold Spring Harbor Laboratory Press.
2007 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1593872
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Trischler, C., Böddeker, N., & Egelhaaf, M. (2007). Characterisation of a blowfly male-specific neuron using behaviourally generated visual stimuli. Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology, 193(5), 559-572. doi:10.1007/s00359-007-0212-3
2005 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1601049
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., Lindemann, J. P., Egelhaaf, M., & Zeil, J. (2005). Responses of blowfly motion-sensitive neurons to reconstructed optic flow along outdoor flight paths. J Comp Physiol A Neuroethol Sens Neural Behav Physiol, 191(12), 1143-1155. doi:10.1007/s00359-005-0038-9
2003 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1773528
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Egelhaaf, M., Böddeker, N., Kern, R., Kretzberg, J., Lindemann, J. P., & Warzecha, A. - K. (2003). Visually guided orientation in flies: case studies in computational neuroethology. Journal of comparative physiology , A: Neuroethology, sensory, neural, and behavioral physiology, 189(6), 401-409. doi:10.1007/s00359-003-0421-3
2003 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1773392
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., & Egelhaaf, M. (2003). Steering a virtual blowfly: simulation of visual pursuit. Proceedings of the Royal Society B, Biological sciences, 270(1527), 1971-1978. doi:10.1098/rspb.2003.2463
2003 | Zeitschriftenaufsatz | Veröffentlicht | PUB-ID: 1773398
PUB
| PDF | DOI | WoS | PubMed | Europe PMC

Böddeker, N., Kern, R., & Egelhaaf, M. (2003). Chasing a dummy target: smooth pursuit and velocity control in male blowflies. Proceedings of the Royal Society B, Biological sciences, 270(1513), 393-399. doi:10.1098/rspb.2002.2240