When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds

Animal activity around the clock with no overt circadian rhythms: patterns, mechanisms and adaptive value

(2013) G. Bloch et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Keeping Time Under the Midnight Sun: Behavioral and Plasma Melatonin Profiles of Free-Living Lapland Longspurs (Calcarius lapponicus) During the Arctic Summer

(2012) Noah T. Ashley et al.   Journal of Experimental Zoology Part A-Ecological Genetics and Physiology

Hibernation and Circadian Rhythms of Body Temperature in Free-Living Arctic Ground Squirrels

(2012) Cory T. Williams et al.   PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY

Adaptive Sleep Loss in Polygynous Pectoral Sandpipers

(2012) J. A. Lesku et al.   SCIENCE

Daily body temperature rhythms persist under the midnight sun but are absent during hibernation in free-living arctic ground squirrels

(2011) C. T. Williams et al.   Biology Letters

Bumblebee foraging rhythms under the midnight sun measured with radiofrequency identification

(2010) Ralph J Stelzer et al.   BMC BIOLOGY

Radiotelemetry reveals variation in fever and sickness behaviours with latitude in a free-living passerine

(2010) James S. Adelman et al.   FUNCTIONAL ECOLOGY

Heritable circadian period length in a wild bird population

(2010) B. Helm et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Social influences on circadian behavioural rhythms in vertebrates

(2009) Angélique Favreau et al.   ANIMAL BEHAVIOUR

Energetic Demands During Incubation and Chick Rearing in a Uniparental and a Biparental Shorebird Breeding in the High Arctic

(2009) Ingrid Tulp et al.   AUK

Persistent diel melatonin rhythmicity during the Arctic summer in free-living willow warblers

(2009) Bengt Silverin et al.   HORMONES AND BEHAVIOR

Nocturnal activity by the primarily diurnal Central American agouti ( Dasyprocta punctata) in relation to environmental conditions, resource abundance and predation risk

(2009) Thomas D. Lambert et al.   JOURNAL OF TROPICAL ECOLOGY

Sleeping outside the box: electroencephalographic measures of sleep in sloths inhabiting a rainforest

(2008) N. C Rattenborg et al.   Biology Letters

Golden hamsters are nocturnal in captivity but diurnal in nature

(2008) R. Gattermann et al.   Biology Letters