Table of Contents: July 2004


Migratory jet-lag.

Image Credit: Cover image and animation created by Pigorsch Media Design, Inc., using a photograph by Russell C. Hansen
Issue Image

White-crowned sparrows (Zonotrichia leucophrys gambelii) follow the migratory route indicated by the yellow arrow along the coast of North America. How these and other song birds sleep during their long journeys, which occur mostly at night, has remained a mystery. Benca and colleagues demonstrate that white-crowned sparrows greatly reduce sleep time during the migratory season, without experiencing deficits in cognitive performance. (See Rattenborg et al.)

Historically, migratory flights, which occur at night when songbirds are normally sleeping, have been studied by counting birds that can be seen crossing the face of the moon (click here to see animation - 1.8MB AVI, 1.6MB MOV, or 1.6MB RV).


Whose Copy? Whose Rights?

Andy Gass, Helen Doyle, Rebecca Kennison



Stopping the Rot

Henry Nicholls

Journal Club

Community Page

Talking Science

Ludmila Pollock

Research Articles

Human Population Density and Extinction Risk in the World's Carnivores

Marcel Cardillo, Andy Purvis, Wes Sechrest, John L Gittleman, Jon Bielby, Georgina M Mace

Honeybee Odometry: Performance in Varying Natural Terrain

Juergen Tautz, Shaowu Zhang, Johannes Spaethe, Axel Brockmann, Aung Si, Mandyam Srinivasan

Migratory Sleeplessness in the White-Crowned Sparrow (Zonotrichia leucophrys gambelii)

Niels C Rattenborg, Bruce H Mandt, William H Obermeyer, Peter J Winsauer, Reto Huber, Martin Wikelski, Ruth M Benca

Lineage-Specific Gene Duplication and Loss in Human and Great Ape Evolution

Andrew Fortna, Young Kim, Erik MacLaren, Kriste Marshall, Gretchen Hahn, Lynne Meltesen, Matthew Brenton, Raquel Hink, Sonya Burgers, Tina Hernandez-Boussard, Anis Karimpour-Fard, Deborah Glueck, Loris McGavran, Rebecca Berry, Jonathan Pollack, James M Sikela

HIV Infection of Naturally Occurring and Genetically Reprogrammed Human Regulatory T-cells

Kyra Oswald-Richter, Stacy M Grill, Nikki Shariat, Mindy Leelawong, Mark S Sundrud, David W Haas, Derya Unutmaz

Hairy Transcriptional Repression Targets and Cofactor Recruitment in Drosophila

Daniella Bianchi-Frias, Amir Orian, Jeffrey J Delrow, Julio Vazquez, Alicia E Rosales-Nieves, Susan M Parkhurst

A Chromosomal Memory Triggered by Xist Regulates Histone Methylation in X Inactivation

Alexander Kohlmaier, Fabio Savarese, Monika Lachner, Joost Martens, Thomas Jenuwein, Anton Wutz