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

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

Synchronization of Indian Weaver Bird Circadian Rhythms to Food and Light Zeitgebers: Role of Pineal

(2009) Sangeeta Rani et al.   CHRONOBIOLOGY INTERNATIONAL

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

(2009) Bengt Silverin et al.   HORMONES AND BEHAVIOR

Circadian Regulation of Agonistic Behavior in Groups of Parthenogenetic Marbled Crayfish, Procambarus sp.

(2009) Abud J. Farca Luna et al.   JOURNAL OF BIOLOGICAL RHYTHMS

A Gentler Method to Raise Melatonin Levels in Birds

(2008) Wolfgang Goymann et al.   JOURNAL OF BIOLOGICAL RHYTHMS