Kaiser, Jocelyn <br/><br/>
Ecology. Lean winters hinder birds' summertime breeding efforts.  [electronic resource] 

 -  Science (New York, N.Y.)  Aug 2003 
 - 1033 p.  digital 
<br/><br/> Publication Type: News 
<br/><br/><label>ISSN: </label>1095-9203 
<br/><br/><label>Standard No.: </label>10.1126/science.301.5636.1033b  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal Migration<br/>Animals<br/>Breeding<br/>Carbon Isotopes--blood<br/>Ecosystem<br/>Environment<br/>Female<br/>Male<br/>Reproduction<br/>Seasons<br/>Songbirds--physiology<br/>Trees