Welcome aboard to our new student Eran Altschuler

25 October 2018

We welcome our new M.Sc. student Eran Altschuler!

Congratulations and warm wishes to our students Inbal and Yosef

27 January 2018

To Inbal for the birth of her daughter, and to Yosef for the birth of his son. We wish them and their families joy and happiness

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New publications

Contrasting aspects of tailswinds and asymmetrical response to crosswinds in soaring migrants

21 February 2018

Becciu, P., Panuccio, M., Catoni, C., Dell'Omo, G., and Sapir, N. 2018. Behavioral Ecology and Sociobiology 72(28).  

Hovering hummingbird wing aerodynamics during the annual cycle. II. Implications of wing feather moult

21 February 2018

Achache Y, Sapir N, Elimelech Y. 2018. Hovering hummingbird wing aerodynamics during the annual cycle. II. Implications of wing feather moult. Royal Society Open Science 5: 171766.  

Moving in the Anthropocene: Global reductions in terrestrial mammalian movements

24 January 2018

Science 359 (6374): 466-469  

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Energy Gain and Use During Animal Migration

Sapir, N., Butler, P.J., Wikelski, M. and Hedenström, A. 2011. Energy Gain and Use During Animal Migration. In Fryxell, J.M., Milner-Gulland, E.J. and Sinclair, A.R.E. (eds.), Animal Migration – A Synthesis. Oxford: Oxford University Press (cited in 1 publication).


A balance of energy gain and use is needed during migration to safeguard against starvation and to minimize the costs of body mass overloading due to excessive lipid deposition. This chapter addresses how this is achieved throughout the four principal stages of animal migration: preparatory, movement, stopover, and arrival. It first discusses how lipid loading may be limited by ecological (e.g., food abundance), physiological (e.g., digestive capacity), and geomagnetic factors, as well as by annual routine events (e.g., the timing of feather moult) and the animal's migration strategy. The chapter then deals with environmental effects on energy use and discusses the energetics of barnacle geese (Branta leucopsis) migrating from Svalbard to Scotland. It proposes that combining accelerometry to provide behavioural data with estimates of metabolic rate may substantially improve our understanding of the causes, mechanisms, patterns, and consequences of animal migration.

About us

We are a group of scientists devoted to the study of animal flight, including animal movement ecology, behavior, physiology and biomechanics. We study wild animals in the field and in the lab using a diversity of research approaches. We welcome applications for M.Sc. and Ph.D. studies and post-doctoral work in our group at the Department of Evolutionary and Environmental Biology at the University of Haifa.