L. P. Brower, W. H. Calvert, L. E. Hedrick and J. Christian. (1977). Biological observations on an overwintering colony of monarch butterflies (Danaus plexippus, Danaidae) in Mexico // J. Lepid. Soc. 31(4). P. 232–242.
W. H. Calvert, L. E. Hedrick and L. P. Brower. (1979). Mortality of the monarch butterfly (Danaus plexippus L.): Avian predation at five overwintering sites in Mexico // Science. 204. P. 848–851.
V. F. Flyger. (1969). The 1968 squirrel “migration” in the eastern United States // Trans. Northeast Sect. Wildlife Society. 26. P. 69–70.
R. E. Henshaw and G. E. Folk, Jr. (1966). Relation of thermoregulation to seasonally changing microclimate in two species of bats (Myotis lucifugus and M. sodalis) // Physiol. Zool. 39. P. 223–236.
R. J. Hock. (1951). The metabolic rates and body temperatures of bats // Biol. Bull. 101. P. 289–299.
S. R. Humphrey and J. B. Cope. (1977). Survival rates of the endangered Indiana bat, Myotis sodalis // J. Mammal. 58. P. 32–36.
A. E. Kammer. (1970). Thoracic temperature, shivering, and flight in the monarch butterfly, Danaus plexippus (L.). // Z. Vergl. Physiol. 68. P. 334–344.
A. R. Masters, S. B. Malcolm and L. P. Brower. (1988). Monarch butterfly (Danaus plexippus) thermoregulatory behavior and adaptations for overwintering in Mexico // Ecology. 69(2). P. 458–467.
B. K. McNab. (1974). The behavior of temperate cave bats in a subtropical environment // Ecology. 5. P. 943–958.
A. R. Richter, S. R. Humphrey, J. B. Cope and V. Brack, Jr. (1993). Modified cave entrances: Thermal effect on body mass and resulting decline of endangered Indiana bats (Myotis sodalis) // Conservation Biology. 7(2). P. 407–415.
J. R. Speakman and P. A. Racey. (1989). Hibernal ecology of the pipistrelle bat: Energy expenditure, water requirements and mass loss, implications for survival and the function of winter emergence flights // J. Animal Ecology. 58. P. 797–813.
M. D. Tuttle. (1979). Status, causes of decline and management of endangered gray bats // J. Wildlife Management. 43. P. 1–17.
F. A. Urquhart. (1976). Found at last: The monarch’s winter home // National Geographic Magazine. 150. P. 160–173.
_. (1987). Monarch Butterfly, the International Traveler. Chicago: Nelson-Hall.
_ and N. R. Urquhart. (1976). The overwintering site of the eastern population of the monarch butterfly (Danaus plexippus; Danaidae) in southern Mexico // J. Lepid. Soc. 30. P. 153–158.
18. Зимние сборища
P. W. Gorenzel and T. P. Salmon. (1995). Characteristics of American crow urban roosts in California // J. Wildlife Management. 59(4). P. 638–645.
H. G. Hanson. (1946). Crow centers of the United States // Oklahoma Game and Fish News. 2(3). P. 4–7, 18.
B. Heinrich. (1989). Communal roosts // B. Heinrich. Ravens in Winter. New York: Simon and Schuster. P. 159–165.
J. M. Marzluff, B Heinrich and C. S. Marzluff. (1996). Roosts are mobile information centers // Animal Behav. 51. P. 89–103.
R. Shine and R. Mason. (2001). Serpentine cross-dressers // Natural History. 110. February. P. 56–61.
P. C. Stouffer and D. F. Caccamise. (1991). Roosting and diurnal movements of radio-tagged American crows // Wilson Bull. 103(3). P. 387–400.
19. Зимние стаи
D. H. Morse. (1977). Feeding behavior and predator avoidance in heterospecific groups // BioScience. 27(5). P. 332–339.
E. Thaler. (1990). Die Goldhähnchen. Wittenberg Lutherstadt: A. Ziemsen Verlag.
20. Консервация ягод
W. H. Karasov. (1993). In the belly of the bird // Natural History. 102. November. P. 32–37.
E. W. Stiles. (1984). Fruit for all seasons // Natural History. 93. August. P. 43–53.
21. Медведи зимой
G. L. Alt and J. M. Grutladavria. (1984). Reuse of black bear dens in northeastern Pennsylvania // J. Wildlife Management. 48. P. 236–239.
H. J. Harlow, T. Lohuis, T. D. I. Beck and P. A. Iaizzo. (2001). Muscle strength in overwintering bears // Nature. 409. P. 997.
R. B. Johnson. (1998). The bearable lightness of being: Bones, muscles, and spaceflight // Anatomical Record. 253(1). P. 24–27.
J. D. Jones, P. Burnett and
