Edwards, S. C., Shoot, T. T., Martin, R. J., Sherry, D. F. & Healy, S. D. 2020. It’s not all about temperature: breeding success also affects nest design. Behavioral Ecology

Cooney, C.R., Sheard, C., Clark, A. D., Healy, S. D., Liker, A., Street, S. E., Troisi, C. A., Thomas, G. H., Székely, T., Hemmings, N. & Wright, A. 2020. Ecology and allometry predict the evolution of avian developmental durations. Nature Communications, 11:2383.

Breen, A. J., Lovie, K. E., Guerard, C., Edwards, S. C., Cooper, J., Healy, S. D. & Guillette, L. M. 2020. Juvenile socio-ecological environment shapes material technology in nest-building birds. Behavioral Ecology


Healy, S.D. 2019. Animal Cognition. Integrative Zoology,14: 128-131.

Walker, D.J., Zimmer, C., Larriva Hormingos, M., Healy, S.D. & Spencer, K. A. 2019. Early-life adversity programs long-term cytokine and microglia expression within the HPA axis in female Japanese quail. Taking an insect-inspired approach to avian navigation. Journal of Experimental Biology, 222: 11p.

Guillette, L.M. & Healy, S.D. 2019. Social learning in nest-building birds watching live-streaming video demonstrators. Integrative Zoology, 14: 204-213.

Tello-Ramos, M.C., Hurly, T. A. & Healy, S.D. 2019. From a sequential pattern, temporal adjustments emerge in hummingbird traplining. Integrative Zoology, 14: 182-192.

Breen, A.J., Bonneaud, C.C., Healy, S.D. & Guillette, L.M. 2019. Social learning about construction behaviour via an artefact. Animal Cognition, 22: 305-315. 

Healy, S.D. 2019. The face of animal cognition. Integrative Zoology, 14: 132-144.


Pritchard, D.J., Hurly, T.A. & Healy, S.D. 2018. Wild hummingbirds require a consistent view of landmarks to pinpoint a goal location. Animal Behaviour,137: 83-94.

Pritchard, D.J. & Healy, S.D. 2018. Taking an insect-inspired approach to avian navigation. Learning and Behavior, 46: 7-22.


McIvor, G. E., & Healy, S.D. 2017. Nest site selection and patterns of nest re-use in the Hooded Crow (Corvus cornix). Bird Study, 64: 374-385.

Carlson, N.V., Healy, S.D., & Templeton, C. N. 2017. Hoo are you? Tits do not respond to novel predators as threats. Animal Behaviour, 128: 79-84.

Pritchard, D.J., Tello Ramos, M. C., Muth, F., & Healy, S. D. 2017. Treating hummingbirds as feathered bees: a case of ethological cross-pollination. Biology Letters, 13: 20170610.

Hornsby, M.A.W., Healy, S.D. & Hurly, T.A. 2017. Wild hummingbirds can use the geometry of a flower array. Behavioural Processes, 139: 33-37.

Federspiel, I.G., Garland, A., Guez, D., Bugnyar, T., Healy, S.D., Gunturkun, O. & Griffin, A.S. 2017. Adjusting foraging strategies: a comparison of rural and urban common mynas (Acridotheres tristis). Animal Cognition, 20: 65-74.

Carlson N.V., Pargeter H.M., Templeton C.N. Sparrowhawk movement, calling, and presence of dead conspecifics differentially impact blue tit (Cyanistes caeruleus) vocal and behavioral mobbing responses. Behavioral Ecology and Sociobiology, 71: 133.

Carlson N.V., Healy S.D., Templeton C.N. A comparative study of how British tits encode predator threat in their mobbing calls. Animal Behaviour, 125: 77-92

Guillette L.M., Healy S.D. The roles of vocal and visual interactions in social learning zebra finches: A video playback experiment. Behavioural Processes.

Griffith S.C. et al., 2017. Variation in reproductive success across captive populations: Methodological differences, potential biases and opportunities. Ethology, 123: 1-29


Brown G.R., Cullum P., Martin S., Healy S.D. Sex differences in performance on a cognitive bias task in Norway rats. Behavioural Processes, 133: 52-55

Pritchard D.J., Hurly T.A., Tello-Ramos M.C. & Healy S.D. Why study cognition in the wild (and how to test it)? Journal of the Experimental Analysis of Behavior, 105: 41-55

Breen A.J., Guillette L.M. & Healy S.D. 2016. What can nest-building birds teach us? Comparative Cognition and Behavior Reviews 11: 83-102

Guillette L.M., Scott A.C.Y. & Healy S.D. 2016. Social learning in nest-building birds: a role for familiarity. Proceedings of the Royal Society B, 283: 20152685

Morgan K.V., Morton A., Whitehead R., Perrett, D.I., Hurly, T.A. & Healy S.D. 2016. Assessment of health in human faces is context-dependent. Behavioural Processes 125: 89-95

Bailey I.E., Morgan K.V., Oschadleus H.D., DeRuiter S.L., Meddle S.L. & Healy S.D. 2016. Nest-building males trade off material collection costs with territory value. Emu 116: 1-8

Bailey I.E. & Nicolson S.W. 2016. Do sunbirds use taste to decide how much to drink? Journal of Animal Ecology 85: 497-506

Pritchard D.J., Scott R.D., Healy S.D. & Hurly T.A. 2016. Wild rufous hummingbirds use local landmarks to return to reward locations. Behavioural Processes 122: 59-66



Guillette L.M. & Healy S.D. 2015. Nest building, the forgotten behaviour. Current Opinion in Behavioural Sciences 6: 90-96

Pritchard, D.J., Hurly, T.A., & Healy, S.D. 2015. Effects of landmark distance and stability on accuracy of reward relocation. Animal Cognition: 1-13

Bailey, I. E., Backes, A., Walsh, P.T., Morgan, K.V., Meddle, S.L., & Healy, S.D. 2015. Image analysis of weaverbird nests reveals signature weave patterns. The Royal Society Open Science, DOI: 10.1098/rsos.150074

Hall, Z.J., Street, S.E., Auty, S., & Healy, S.D. 2015. The coevolution of building nests on the ground and domed nests in Timaliidae. The Auk: July 2015, Vol. 132, No. 3, pp. 584-593.

Tello-Ramos, Maria C., Hurly, T Andrew & Healy, Susan D. 2015. Traplining in hummingbirds: flying short-distance sequences among several locations. Behavioral Ecology 26: 812-819

Tello-Ramos M.C., Hurly T.A., Higgott C., Healy S.D. 2015. Time-place learning in wild , free-living hummingbirds. Animal Behaviour 104:123–129.

Griffin, A.S., Guillette, L.M. & Healy, S.D. 2015. Cognition and personality: an analysis of an emerging field. Trends in Ecology and Evolution 1907: 1-8

Hall, Z.J., Healy, S.D. &. Meddle, S.L. 2015. A role for nonapeptides and dopamine in nest-building behaviour. Journal of Neuroendocrinology 27: 158-165.

Bailey, I. E., Muth, F., Morgan, K., Healy, S. D. 2015. Birds build camouflaged nests. AUK 132 (1): 11-15   



Rowe, C. & Healy, S.D. 2014.  Measuring cognition will be difficult but worth it: a response to comments on Rowe and Healy. Behavioral Ecology 25(6): 1298

Samuels, M., Hurly, T.A. & Healy, S.D. 2014. Colour cues facilitate learning flower refill schedules in wild hummingbirds. Behavioral Processes. 109 (B): 157-163

Guillette, L.M., Morgan, K.V., Hall, Z.J, Bailey, I.E. & Healy, S.D. 2014. Food preference and copying behaviour in zebra finches, Taeniopygia guttata. Behavioral Processes 109 (B): 145-150

Morgan, K. V., Hurly, T. A. & Healy, S.D. 2014. Individual differences in decision making by foraging hummingbirds. Behavioral Processes 109(B): 195-200

Rowe, C. & Healy, S.D. 2014.Measuring variation in cognition. Behavioral Ecology 25(6): 1287-1292 

Tello-Ramos, M.C., Hurly, A.T., Healy S.D. 2014. Females hummingbirds do not relocated rewards using colour cues. Animal Behaviour 93: 129-133

Flores-Abreu, I. N., Hurly, T.A., Ainge, J.A. & Healy, S.D.  2014.  3-D space: locomotory style explains memory differences in rats and hummingbirds. Proceedings of the Royal Society B, 281: 1784

Bailey, I.E., Morgan, K.V., Bertin, M., Meddle, S.L. & Healy, S.D.  2014. Physical cognition: birds learn the structural efficacy of nest material. Proceedings of the Royal Society B, 281: 1784

Guillette, L.M. & Healy, S.D. 2014. Mechanisms of copying behvaiour in zebra finches. Behavioural Processes 108: 177-182

Hurly, T.A., Fox, T.A., Zwueste, D. M. & Healy, S.D.  2014. Wild hummingbirds rely on landmarks not geometry when learning an array of flowers. Animal Cognition 17 (5): 1157-1165

Muth, F. & Healy, S.D.  2014.  Zebra finches select nest material appropriate for a building task. Animal Behaviour 90:  237-244

Hall, Z.J., Bertin, M., Bailey, I.E., Meddle, S.L. & Healy, S.D.  2014.  Neural correlates of nesting behavior in zebra finches (Taeniopygia guttata). Behavioural Brain Research 264:  26-33.

Jelbert, S.J., Hurly, T.A., Marshall, R.E.S. & Healy, S.D. 2014. Wild, free-living hummingbirds can learn what happened, where and in which context. Animal Behaviour 89: 185-189



Muth, F., Steele, M., Healy, S.D. 2013. Colour preferences in nest-building zebra finches. Behavioural processes 99: 1-6-111 

Bailey, I.E., Segelbacher, G., Healy, S.D., Hurly, A.T., and Pemberton, J.M. May 2013. Microsatellite variation in Rufous Hummingbirds (Selasphorous rufus) and evidence for a weakly structured population. Journal of Ornithology 154: 1029- 1037

Walsh, P.T., Hansell, M., Borello, W.D. & Healy, S.D. 2013. Are elaborate bird nests built using simple rules? Avian Biology Research 6 (2): 1-6 

Healy, S.D., Hurly, T.A. 2013. What hummingbirds can tell us about cognition in the wild. Comparative Cognition & Behavior Review 8: 13-28.

Hall, Z. J., Street, S. & Healy, S.D. 2013. The evolution of cerebellum structure correlates with nest complexity. Biology Letters 9: 20130687

Marshall, R.E.S., Hurly, T.A., Sturgeon, J., Shuker, D.M. & Healy, S.D. 2013. What, where and when: deconstructing memory. Proceedings of the Royal Society B 280: 20132184

Healy, S.D. & Rowe, C. 2013. Costs and benefits of evolving a larger brain: Doubts over the evidence that large brains lead to better cognition. Animal Behaviour 86: E1-E3.

Flores-Abreu, I. N., Hurly, T.A. & Healy, S.D. 2013. Three-dimensional spatial learning in hummingbirds. Animal Behaviour 85: 579-584.



McIvor, G.E., Rowe, C. & Healy, S.D. 2012. Deterring Hooded crows from re-nesting on power-poles. Wildlife Society Bulletin 36: 729-734.

Rioja-Lang, F.C., Roberts, D.J. , Healy, S.D., Lawrence, A.B. & Haskell, M.J. 2012. Dairy cow feeding space requirements assessed in a Y-maze choice test. Journal of Dairy Science 95 (7): 3954-3960.

Kelley, L.A., Healy, S.D. 2012. Vocal mimicry in spotted bowerbirds is associated with an alarming context. Journal of Avian Biology 43 (6): 525-530.

Marshall, R. E. S., T. A. Hurly, and S. D. Healy. 2012. Do a flowers features help hummingbirds to learn its contents and refill rate. Animal Behaviour 83:1163-1169.

Healy, S.D. 2012. Animal cognition: The trade off to being smart. Current Biology 22: R840-R841

Jozet-Alves, C., Viblanc, V.A., Romagny, S., Dacher, M ., Healy, S.D. & Dickel, L. 2012. Visual lateralization is task and age dependent in cuttlefish, Sepia officinalis. Animal Behaviour 83 (6): 1313-1318.

Mishra, C. E. B., I. E. Bailey, S. Healy, and T. A. Hurly. 2012. Systematic Spatial Foraging Patterns in Hummingbird Rufous Hummingbirds (Selasphorus rufus). Canadian Journal of Experimental Psychology-Revue Canadienne De Psychologie Experimentale 66:300-300.

Flores-Abreu, I. N., T. A. Hurly, and S. D. Healy. One-trial spatial learning- wild hummingbirds relocate a reward after a single visit. Animal Cognition 15:631-637.

Muth, F. Healy, S.D. 2012. Zebra Finches build nests that do not resemble their natal nest. Avian Biology Research 5 (4): 218-226

Morgan, K. V., T. A. Hurly, M. Bateson, L. Asher, and S. D. Healy. 2012. Context-dependent decisions among options varying in a single dimension. Behavioural Processes 89:115-120.



Healy, S. 2011. My life in science. Current Biology 21 (22): R907-R908.

Muth, F., Healy, S.D. 2011. The role of adult experience in the nest building zebra finch. Animal Behaviour 82 (2): 185-189

Kelley, L.A., & Healy, S.D. 2011. Vocal Mimicry. Current Biology 21: R9-R10.

Donald, R.D., Healy, S.D., Lawrence, A.B. & Rutherford, K.M.D. 2011. Emotionality in growing pigs: Is the open field a valid test? Physiology & Behavior 104 (5): 906-913.

Walsh, P.T., Hansell, M., Borello, W.D., Healy, S.D. 2011. Individuality in nest building: Do Southern Masked weaver (Ploceus velatus) males vary in their nest-building behaviour? Behavioural Processes 88 (1): 1-6

Bacon, I. E., Hurly, T. A. & Healy, S. 2011. Hummingbirds choose not to rely on good taste. Behavioral Ecology 22 (3): 471-477

Kelley, L., & Healy, S,D, 2011. The mimetic repertoire of the spotted bowerbird Ptilonorhynchus maculatus. Naturwissenschaften 98: 501-507.



Rowe, C., & Healy, S.D. 2010. Is Bigger Always Better? Science 333: 708-709. 

Bacon, I. E., Hurly, T. A. & Healy, S. 2010. Both the past and the present affect risk-sensitive decisions of foraging rufous hummingbirds. Behavioral Ecology 21: 626-632.

Hurly, T. A., S. Franz, and S. D. Healy. 2010. Do rufous hummingbirds (Selasphorus rufus) use visual beacons? Animal Cognition 13: 377-383.

Walsh, P.T., Hansell, M., Borello, W.D., Healy, S.D. 2010. Repeatability of nest morphology in African weaver birds. Biology Letters 6(2): 149-151

Healy, S. D., O. Haggis, and N. S. Clayton. 2010. Zebra Finches and cognition. Emu 110: 242-250.

Kelley, L.A., & Healy, S.D, 2010. Vocal mimicry in male bowerbirds- who learns from whom?  Biology Letters  6 (5): 626-629.

Harris, A.P., D’Eath, R.B. & Healy, S.D. 2010. A cage without a view increases stress and impairs cognitive performance in rats. Animal Welfare 19 (3): 235-241.



Healy, S. D., I. E. Bacon, O. Haggis, A. P. Harris, and L. A. Kelley. 2009. Explanations for variation in cognitive ability: Behavioural ecology meets
comparative cognition. Behavioural Processes 80: 288-294.

Heenan, A., Simpson, S.D., Meekan, M.G., Healy, S.D. & Braithwaite, V.A. 2009. Restoring depleted coral-reef fish populations through recruitment enhancement: a proof of concept. Journal of Fish Biology 75 (7): 1857-1867.

Harris, A.P., D’Eath, R.B. & Healy, S.D. 2009. Environmental enrichment enhances spatial cognition in rats by reducing thigmotaxis (wall hugging) during testing. Animal Behaviour 77 (6): 1459-1464.

Rioja-Lang, F.C., Roberts, D.J., Healy, S.D., Lawrence, A.B. & Haskell, M.J. 2009. Dairy cows trade-off feed quality with proximity to a dominant individual in Y-maze choice tests. Applied Animal Behaviour Science 117 (3-4): 159-164.



Harris, A.P., D’Eath, R.B. & Healy, .SD. 2008. Sex differences, or not, in spatial cognition in albino rats- acute stress is the key. Animal Behaviour 76 (5): 1579-1589.

Hodgson, Z.G., Meddle, S.L., Christians, J.K., Sperry, T.S. & Healy, S.D. 2008. Influence of sex steroid hormones on spatial memory in a songbird. Journal of Comparative Physiology A 194 (11): 963-969.

Kelley, L.A., Coe, R.L., Madden, J.R. & Healy, S.D. 2008. Vocal mimicry in songbirds. Animal Behaviour 76 (3): 521-528.

Harris, A.P., D’Eath, R.B. & Healy, S.D. 2008. Sex differences in spatial cognition are not caused by isolation housing. Behaviour 145 (6): 757-778.

Healy, S.D., Walsh, P., Hansell, M., 2008. Nest buidling by birds. Current Biology 18 (7): 27-273



Healy, S.D. & Rowe, C. 2007. A critique of comparative studies of brain size. Proceedings of the Royal Society B: Biological Sciences 274 (609): 453-464.

Hodgson, Z.G., Meddle, S.L., Roberts, M.L., Buchanan, K.L., Evans, M.R., Metzdorf, R., Gahr, M & Healy, S.D. 2007. Spatial ability is impaired and hippocampal mineralocorticoid receptor mRNA expression reduced in zebra finches (Taeniopygia guttata) selected for acute high corticosterone response to stress. Proceedings of the Royal Society B: Biological Sciences 274 (1607): 239-245.



Jones, C.M. & Healy, S.D. 2006. Differences in cue use and spatial memory in men and women. Proceedings of the Royal Society B: Biological Sciences 273 (1598): 2241-2247.

Henderson, J., T. A. Hurly, M. Bateson, and S. D. Healy. 2006. Timing in free-living rufous hummingbirds, Selasphorus rufus. Current Biology 16: 512-515.

Henderson, J., T. A. Hurly, and S. D. Healy. 2006. Spatial relational learning in rufous hummingbirds (Selasphorus rufus). Animal Cognition 9 (3): 201-205.

Healy, S. and T. A. Hurly. 2006. Hummingbirds. Current Biology 16: R392-R393.



Healy, S.D., de Kort, S.R. & Clayton, N.S. 2005. The hippocampus, spatial memory and food hoarding- a puzzle revisited. Trends in Ecology and Evolution 20 (1): 17-22

Bateson, M. & Healy, S.D.2005. Comparative evaluation and its implications for mate choice. Trends in Ecology and Evolution 20 (12): 659-664

Hodgson, Z.G. & Healy, S.D. 2005. Preference for spatial cues in a non-storing songbird species. Animal Cognition 8 (3): 211-214.



Healy, S. D. and T. A. Hurly. 2004. Spatial learning and memory in birds. Brain Behavior and Evolution 63: 211-220.



Jones, C.M., Braithwaite, V.A. & Healy, S.D. 2003. The evolution of sex differences in spatial ability. Behavioural Neuroscience 117 (3): 403-411.

Healy, S.D. & Hurly, T.A. 2003. Cognitive ecology: Foraging in hummingbirds as a model system. Advances in the Study of Behavior 23: 325-359.

Bateson, M., S. D. Healy, and T. A. Hurly. 2003. Context-dependent foraging decisions in rufous hummingbirds. Proceedings of the Royal Society B-Biological Sciences 270:1271-1276.




 S. D. Healy, and T. A. Hurly. 2002. Irrational choices in hummingbird foraging behaviour. Animal Behaviour 63: 587-596.

Hurly, T. A. and S. D. Healy. 2002. Cue learning by rufous hummingbirds (Selasphorus rufus). Journal of Experimental Psychology-Animal Behavior Processes 28: 209-223.

Hampton, R.R., Healy, S.D., Shettleworth, S.J. & Kamil, A.C. 2002. `Neuroecologists’ are not made of straw. Trends in Cognitive Sciences 6 (1): 6-7.

Healy, S.D. & Jones, C.M. 2002. Animal learning and memory: an integration of cognition and ecology. Zoology 105 (4): 321-327.



Hurly, T. A., R. D. Scott, and S. D. Healy. 2001. The function of displays of male Rufous Hummingbirds. Condor 103: 647-651.

Healy, S. D. and T. A. Hurly. 2001. Foraging and spatial learning in hummingbirds. Animal behaviour and floral evolution. Editors: Chittka, Lars; Thomson, James D: 127-147

Henderson, J., T. A. Hurly, and S. D. Healy. 2001. Rufous hummingbirds’ memory for flower location. Animal Behaviour 61: 981-986.

Biegler, R., McGregor, A., Krebs, J.R. & Healy, S.D. 2001. A larger hippocampus is associated with longer-lasting spatial memory. Proceedings of the National Academy of Sciences of the United States of America  98 (12): 6941-6944.



Healy, S. & Braithwaite, V. 2000. Cognitive ecology: a field of substance? Trends in Ecology and Evolution 15 (1): 22-26.

Healy, S.D., Braham, S.R. & Braithwaite, V.A. 1999. Spatial working memory in rats: no differences between the sexes. Proceedings of the Royal Society of London Series B: Biological Sciences 266 (1435): 2303-2308.

McGregor, A. & Healy, S.D. 1999. Spatial accuracy in food-storing and nonstoring birds. Animal Behaviour 58 (4): 727-734.

Healy, S. 1999. Cognitive ecology: The evolutionary ecology of information processing and decision making. Quarterly Journal of Experimental Psychology: Section B Comparative and Physiological Psychology 52 (2): 187-189.

Healy, S. D. and T. A. Hurly. 1998. Rufous Hummingbirds’ (Selasphorus rufus) Memory for Flowers- Patterns or Actual Spatial Locations? Journal of Experimental Psychology-Animal Behavior Processes 24: 396-404.

Healy, S.D., Gwinner, E. & Krebs, J.R. 1996. Hippocampal volume in migratory and non-migratory warblers. Behavioural Brain Research  81 (1-2): 61-68.

Tille, Y., Newman, J.A. & Healy, S.D. 1996. New tests for departures from random behavior in spatial memory experiments. Animal Learning & Behavior 24: (3) 327-340.

Hurly, T. A. and S. D. Healy. 1996. Memory for flowers in rufous hummingbirds-location or local visual cues? Animal Behaviour: 1149-1157.

Healy, S.D. & Krebs, J.R. 1996. Food storing and the hippocampus in Paridae. Brain Behavior and Evolution 47 (4): 195-199.

Healy, S.D. & Suhonen, J. 1996. Memory for locations of stored food in willow tits and marsh tits. Behaviour 133 (1-2): 71-80.

Krebs, J.R., Clayton, .N.S., Healy, S.D., Cristol, D.A., Patel, S.N. & Jolliffe, A.R. 1996. The ecology of the avian brain: Food-storing memory and the hippocampus. IBIS 138: 34-46.



Healy, S.D. 1995. Memory for objects and positions: Delayed non-matching to sample in storing and nonstoring tits. Quarterly Journal of Experimental Psychology: Section B Comparative and Physiological Psychology 48 (2): 179-191.

Healy, S. D. and T. A. Hurly. 1995. Spatial memory in rufous hummingbirds: A field test. Animal Learning & Behavior: 63-68.

Healy, S.D. 1994. Animal memory and adaptation. Recherche 25 (267): 768-773.

Healy, S.D., Clayton, N.S. & Krebs, J.R. 1994. Development of hippocampal specialization in two species of tit (Parus spp). Behavioural Brain Research 61 (1): 23-28.

Devoogd, T.J., Krebs, J.R., Healy, S.D., Purvis, A. 1993. Relations between song repertoire size and the volume of brain nuclei related to song: Comparative evolutionary analyses amongst Oscine birds. Proceedings of the Royal Society of London Series B: Biological Sciences 254 (1340): 75-82.

Healy, S.D. & Krebs, K.R. 1993. Development of hippocampal specialisation in a food-storing bird. Behavioural Brain Research 53 (1-2): 127-131.

Healy, S.D. & Krebs, J.R. 1992. Delayed matching to sample by Marsh tits and Great tits. Quarterly Journal of Experimental Psychology: Section B Comparative and Physiological Psychology 45B (1): 33-47.

Healy, S.D. & Krebs, J.R. 1992. Food storing and the hippocampus in corvids: Amount and volume are correlated. Proceedings of the Royal Society of London Series B: Biological Sciences 248 (1323): 241-245.

Healy, S.D. & Krebs, J.R. 1992. Comparing spatial memory in two species of tit- Recalling a single positive location. Animal Learning & Behavior 20 (2): 121-126.

Healy, S.D., Krebs, J.R. & Gwinner, E. 1991. Hippocampal volume and migration in passerine birds. Naturwissenschaften 78 (78): 424-426



Krebs, J.R., Healy, S.D. & Shettleworth S.J. 1990. Spatial memory of Paridae: Comparison of a storing and a non storing species, the Coal tit, Parus ater, and the Great tit, P major. Animal Behaviour 39 (6): 1127-1137.

Healy, S. & Guilford, T. 1990. Olfactory-bulb size and nocturnality in birds. Evolution 44 (2): 339-346.

Shettleworth, S.J., Krebs, J.R., Healy, S.D., Thomas, C.M. 1990. Spatial memory of food-storing tits (Parus ater and Parus atricapillus): Comparison of storing and nonstoring tasks. Journal of Comparative Psychology 104 (1): 71-81.

Healy, S.D. & Harvey, P.H. 1990. Comparative studies of the brain and its components. Netherlands Journal of Zoology 40 (1-2): 203-214.

Krebs, J.R., Hilton, S.C., Healy, S.D., Edelman, G.M., Gall, W.E. & Cowan, W.M. 1990. Memory in food-storing birds: Adaptive specialization in brain and behavior. In G. M. Edelman, W. E. Gall, & W. M. Cowan (Eds.), Signal and sense: Local and global order in perceptual maps. New York. Springer:  475-498.

Krebs, J.R., Sherry, D.F., Healy, S.D., Perry, V.H. & Vaccarino, A.L. 1989. Hippocampal specialization of food-storing birds. Proceedings of the National Academy of Sciences of the United States of America 86 (4): 1388-1392.