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(a) Time evolutions of 
, 
, and 
. (b) Time evolutions of 
, 
, and 
. (c) Power spectrum (on a log scale) obtained from a continuous wavelet transform of 
and time evolution of fwb (dashed line). (d) The same 3D trajectory coloured by 
, 
and fwb. (e) Time series of bird images on one camera, along with their intensity weighted centres (top row) and 2D locations obtained by re-projecting 
onto images (bottom row). (Online version in colour.)
