1. Volume 18, Issue 1, Pages 69-73 (January 2008)
Referential Calls Signal Predator Behavior in a Group-Living Bird Species 
Michael Griesser 
Current Biology 
Volume 18, Issue 1, Pages (January 2008)
DOI: /j.cub
Copyright © 2008 Elsevier Ltd Terms and Conditions

2. Figure 1 Predator-Behavior-Specific Calls of Siberian Jays
Calls given toward perched hawks (A), searching hawks (B), and attacking hawks (C). Calls were plotted with a 256 point Fourier transformation (Blackman window function).
Current Biology  , 69-73DOI: ( /j.cub )
Copyright © 2008 Elsevier Ltd Terms and Conditions