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Image Files:
- Alaska: Toolik Lake, Fairbanks, Anchorage, Cordova>
- California: Bodega Bay, Tioga Pass
- Washington State: Cascade Mountain, Olympic Mountains, western Washington,
Seattle (urban), San Juan Islands
- Costa Rica: Cuerici, Finca dos Lados
- Ecuador: Papallacta
- Peru: Urubamba valley
- Chile: Quebrada de la Plata, Los Farellones, Valdivia, Isla Navarino
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Published Works:
Sample only; see E-BIRD USA Bibliography
for more citations.
- Astheimer L.B., Buttemer W.A., Wingfield J.C. (1994)
- Gender and seasonal differences in the adrenocortical response to ACTH challenge in an arctic passerine,
Zonotrichia leucophrys gambelii. Gen Comp Endocrinol 94:33-43.
- Breuner C.W., Greenberg A.L., Wingfield J.C. (1998)
- Non-invasive corticosterone treatment rapidly increases activity in Gambel's White-crowned Sparrows
(Zonotrichia leucophrys gambelii). Gen Comp Endocrinology 111(3):386-394.
- Breuner, C. W., Orchinik, M., Hahn, T. P., Meddle, S.L., Moore, I.T., Owen-Ashley, N. T., Sperry, T.S.,
and Wingfield, J. C. (2003)
- Differential mechanisms for plasticity of the stress response across latitudinal gradients. American
J Physiology: Reg, Integ, Comp Physiology 285:594-600.
- Kubokawa K., Ishii S., Wingfield J.C. (1994)
- Effect of day length on luteinizing hormone ß-subunit mRNA and subsequent gonadal growth in the white-crowned
sparrow, Zonotrichia leucophrys gambelii. Gen Comp Endocrinol 95:42-51.
- Lynn S.E., Breuner C.W., Wingfield J.C. (2003)
- The effects of short-term fasting on activity, corticosterone, and corticosterone binding globulin in a
migratory songbird, Gambel’s white-crowned sparrow (Zonotrichia leucophrys gambelii). Hormones and
Behavior 43:150-157.
- Maney D.L., Hahn T.P., Schoech S.J., Sharp P.J., Morton M.L., Wingfield J.C. (1999)
- Effects of ambient temperature on photo-induced prolactin secretion in three subspecies of white-crowned
sparrow (Zonotrichia leucophrys). Gen Comp Endocrinol 113:445-456.
- Moore I.T., Bonier F., and Wingfield J.C. (2005)
- Reproductive asynchrony and population divergence between two tropical bird populations. Behavioral
Ecology 16:755-762.
- Osugi T., Ukena K., Bentley G.E., O'Brien S., Moore I.T., Wingfield J.C., Tsutsui K. (2004)
- Gonadotropin-inhibitory hormone in Gambel's white-crowned sparrow (Zonotrichia leucophrys gambelii):
cDNA identification, transcript localization and functional effects in laboratory and field experiments. J
Endocrinology 182:33-42.
- Romero L.M., Wingfield J.C. (1998)
- Seasonal changes in adrenal sensitivity alter corticosterone levels in Gambel's white-crowned sparrows
(Zonotrichia leucophrys gambelii). Comp Biochem Physiol 119C:31-36.
- Romero L.M., Ramenofsky M., Wingfield J.C. (1997)
- Season and migration alters the corticosterone response to capture and handling in an arctic migrant,
the White-crowned sparrow (Zonotrichia leucophrys gambelli). Comp Biochem Physiol 116C:171-177.
- Wingfield J.C., Hahn T.P., Maney D.L., Schoech S.J., Wada M., Morton M.L. (2003)
- Effects of temperature on photoperiodically induced reproductive development, circulating plasma lutenizing
hormone and thyroid hormones, body mass, fat deposition and molt in mountain white-crowned sparrows,
Zonotrichia leucophrys oriantha. Gen Comp Endocrinology 131:143-158.
- Wingfield J.C., Hahn T.P., Wada M., Schoech S.J. (1997)
- Effects of day length and temperature on gonadal development, body mass, and fat depots in White-crowned
sparrows, Zonotrichia leucophrys pugetensis. Gen Comp Endocrinology 107(1):44-62.
- Wingfield J.C., Hahn T.P., Wada M., Astheimer L.B., Schoech S. (1996)
- Interrelationship of day length and temperature on the control of gonadal development, body mass, and fat
score in White-crowned sparrows, Zonotrichia leucophrys gambelii. Gen Comp Endocrinology
101(3):242-255.
- Wingfield J.C., Vleck C.M., Farner D.S. (1981)
- Effect of day length and reproductive state on diel rhythms of luteinizing hormone levels in the plasma of
White-crowned sparrows, Zonotrichia leucophrys gambelii. J Exp Zool 217:261-264.
- Wingfield J.C., Farner D.S. (1979)
- Some endocrine correlates of renesting after loss of clutch or brood in the White-crowned sparrow,
Zonotrichia leucophrys gambelii. Gen Comp Endocrinology 38:322-331.
- Wingfield J.C., Farner D.S. (1978)
- The endocrinology of a naturally breeding population of the White-crowned sparrow (Zonotrichia leucophrys
pugetensis). Physiol Zool 51:188-205.
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A long term study (began in 1974) on the environmental and hormonal control of
breeding, migration and molt in sparrows (Zonotrichia leucophrys and Zonotrichia capensis)
along latitudinal gradients from 70°N to 55°S. Currently we are determining whether mechanisms (e.g.
photoperiodism) by which southern hemisphere birds respond to environmental cues are similar to those in
the north; or whether totally different mechanisms are used to cope with seasonality.
