Robart, Ashley R <br/><br/>
Increasing photoperiod stimulates the initiation of spring migratory behaviour and physiology in a facultative migrant, the pine siskin.  [electronic resource] 

 -  Royal Society open science  Aug 2018 
 - 180876 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>2054-5703 
<br/><br/><label>Standard No.: </label>10.1098/rsos.180876  doi