Alerstam, T (1990) Bird Migration. Cambridge: Cambridge University Press.
Anderson, ME & Racey, PA (1991) Feeding behaviour of captive brown long-eared bats, Plecotus auritus. Animal Behaviour 42, 489–493.
Avery, MI (1985) Winter activity of pipistrelle bats. Journal of Animal Ecology 54, 721–738.
Baker, R (1980) The Mystery of Migration. London: Macdonald Futura Books.
Baker, WW, Marshall, SG & Baker, VB (1968) Autumn fat deposition in the evening bat (Nycticieus humeralis). Journal of Mammalogy 49, 314–317.
Barclay, RMR, Dolan, M & Dyck, A (1991) The digestive efficiency of insectivorous bats. Canadian Journal of Zoology 69, 1853–1856.
Beer, JR & Richards, AG (1956) Hibernation of the big brown bat. Journal of Mammalogy 37, 31–41.
Berteaux, D, Bergeron, JM, Thomas, DW & Lapierre, H (1996) Solitude versus gregariousness - do physical benefits drive the choice in overwintering meadow voles. Oikos 76, 330–336.
Brisbin, IL (1966) Energy use by a captive Hoary bat. Journal of Mammalogy 47, 719–720.
Cameron, M (1994) Monthly Digest of Statistics no. 585. London: Central Statistics Office, H. M. Stationery Office.
Daan, S (1973) Activity during natural hibernation in three species of vespertilionid bats. Netherlands Journal of Zoology 23, 1–71.
Davis, WH (1970) Hibernation: ecology and physiological ecology. In The Biology of Bats, vol. 3, pp.265–300 [Wimsatt, WA, editor]. New York: Academic Press.
Davis, WH & Hitchcock, HB (1965) Biology and migration of the bat, Myotis lucifugus, in New England. Journal of Mammalogy 46, 296–313.
Ewing, WG, Studier, EH & O'Farrell, M (1970) Autumn fat deposition and gross body composition in three species of Myotis. Comparative Biochemistry and Physiology 36, 119–129.
Funakoshi, K & Uchida, TA (1978) Studies on the physiological and ecological adaptations of temperate insectivorous bats. III Annual activity of the Japanese house dwelling bat, Pipistrellus abramus. Journal of the Faculty of Agriculture, Kyushu University 23, 95–115.
Geiser, F & Kenagy, J (1988) Torpor duration in relation to temperature and metabolism in hibernating ground squirrels. Physiological Zoology 61, 442–449.
Hammond, KA & Diamond, J (1997) Maximal sustained energy budgets in humans and animals. Nature 386, 457–462.
Hart, JS (1957) Climatic and temperature induced changes in the energetics of homeotherms. Revue Canadienne de la Biologie 16, 133–174.
Heldmaier, G (1989) Seasonal acclimatization of energy requirements in mammals: functional significance of body weight control, hypothermia, torpor and hibernation. In Energy Transformations in Cells and Organisms, pp. 130–139 [Weiser, W and Gnaiger, E, editors] New York: Springer.
Hock, R (1951) The metabolic rates and body temperatures of bats. Biological Bulletin 101, 289–299.
Kahlabukhov, NI (1960) Comparative ecology of hibernating mammals. Bulletin of the Museum of Comparative Zoology, Havard University 124, 45–74.
Karasov, WH (1983) Wintertime energy conservation by huddling in antelope ground squirrels (Ammospermophilus leucurus). Journal of Mammalogy 64, 341–345.
Kayser, C (1961) The Physiology of Natural Hibernation. New York: Pergamon Press.
Krulin, GS & Sealander, JA (1972) Annual lipid cycle of the gray bat Myotis grisescens. Comparative Biochemistry and Physiology 42, 537–549.
Krzanowski, A (1961) Weight dynamics of bats wintering in a cave at Pulawy (Poland). Acta Theriologica 4, 242–264.
Livoreil, B & Baudoin, C (1996) Differences in food hoarding behaviour in two species of ground squirrels Spermophilus tridecemlineatus and Spermophilus spilosoma. Ethology Ecology and Evolution 8, 199–205.
Lyman, CP (1954) Activity, food consumption and hoarding in hibernation. Journal of Mammalogy 35, 542–552.
Neuheuser, HN & Brisbin, IL (1964) Energy utilisation by a captive silver-haired bat. Bat Research News 10, 30–31.
O'Farrell, MJ & Bradley, WG (1970) Activity patterns of bats over a desert spring. Journal of Mammalogy 51, 18–26.
O'Farrell, MJ & Studier, EH (1970) Fall metabolism in relation to ambient temperature in three species of. Myotis. Comparative Biochemistry and Physiology 35, 697–704.
O'Farrell, MJ, Studier, EH & Ewing, WG (1971) Energy utilisation and water requirements of captive M. lucifugus and M. thysandodes. Comparative Biochemistry and Physiology 39A, 549–552.
Oliver, JE & Fairchild, RW (1984) The Encyclopedia of Climatology. New York: Von Nostrand Reinhold.
Ransome, R (1971) The effect of ambient temperature on arousal frequency of the hibernating Greater Horseshoe bat (Rhinolophus ferrumequinum) in relation to site selection and the hibernation site. Journal of Zoology 164, 353–371.
Rydell, J (1989) Food habits of northern (Eptesicus nilssoni) and brown long-eared (Plecotus auritus) bats in Sweden. Holarctic Ecology 12, 16–20.
Secor, SM, Stein, EJ & Diamond, J (1994) Rapid up-regulation of snake intestine in response to feeding - a new model of intestinal adaptation. American Journal of Physiology 266, G695–G705.
Speakman, JR (1997) Doubly-labelled Water: Theory and Practice. London: Chapman & Hall.
Speakman, JR & Racey, PA (1987) The energetics of pregnancy and lactation in the brown long-eared bat (Plecotus auritus) In Recent Advances in the Study of Bats, pp. 367–393 [Fenton, MB, Racey, PA and Rayner, JMV, editors]. Cambridge: Cambridge University Press.
Speakman, JR & Racey, PA (1989) Hibernal ecology of the pipistrelle bat: energy expenditure, water requirements and mass loss - implications for survival and the function of winter emergence flights. Journal of Animal Ecology 58, 797–813.
Speakman, JR, Racey, PA, Catto, CMC, Webb, PI, Swift, SM & Burnett, AM (1991) Minimum population estimates and densities of bats in NE Scotland, near to the Northern borders of their distributions, during summer. Journal of Zoology 225, 327–345.
Stebbings, RE & Griffith, F (1986) Distribution and Status of Bats in Europe. Huntingdon, Cambs.: Institute of Terrestrial Ecology.
Stones, RC & Weibers, JE (1967) Temperature regulation in the little brown bat, Myotis lucifugus In Mammalian Hibernation, vol. 3, pp.97–109[Fischer, KC, editor]. New York: Oliver and Boyd.
Strijkstra, AM & Daan, S (1997) Sleep during arousal episodes as a function of prior torpor duration in hibernating European ground squirrels. Journal of Sleep Research 6, 36–43.
Studier, EH, Behrend, TA & Freed, AL (1976) Effect of temperature on intrinsic intestinal motility in a hibernator. Journal of Thermal Biology 1, 149–151.
Swift, SM & Racey, PA (1983) Resource partitioning in two species of vespertilionid bats (Chiroptera) occupying the same roost. Journal of Zoology 200, 249–259.
Thomas, DW (1995) The physiological ecology of hibernation in vespertilionid bats. Symposia of the Zoological Society of London 67, 233–244.
Thomas, DW & Cloutier, D (1992) Evaporative water loss by hibernating little brown bats, Myotis lucifugus. Physiological Zoology 65, 443–456.
Thomas, DW, Dorais, M & Bergeron, JM (1990) Winter energy budgets and the cost of arousals for hibernating little brown bats, Myotis lucifugus. Journal of Mammalogy 71, 475–479.
Thomas, DW & Geiser, F (1997) Periodic arousals in hibernating mammals: is evaporative water loss involved? Functional Ecology 11, 585–591.
Twente, JW & Twente, JA (1965) Regulation of hibernating periods by temperature. Proceedings of the National Academy of Sciences USA 54, 1058–1061.
Wang, LCH (1978) Energetic and field aspects of mammalian torpor: the Richardsons ground squirrel. In Strategies in the Cold, pp. 109–145 [Wang, LHC and Hudson, JW, editors]. New York: Academic Press.
Webb, PI, Speakman, JR & Racey, PA (1993) Defecation, apparent absorption efficiency, and the importance of water obtained in the food for water balance in captive brown long-eared (Plecotus auritus) and Daubenton's (Myotis daubentoni) bats. Journal of Zoology 230, 619–628.
Weiner, J (1989) Metabolic constraints on mammalian energy budgets. Acta Theriologica 34, 3–35.
Witter, MS, Cuthill, IC & Bonser, KHC (1994) Experimental investigations of mass specific predation risk in the European Starling Sturnus vulgaris. Animal Behaviour 48, 201–222