Fig. 2From: Wild common crossbills produce redder body feathers when their wings are clippedEffect of feather clipping on male common crossbill rump redness at first capture (left) and recapture several weeks later (right). A Raw data and (B) raw values at capture but predicted values at recapture. Predicted values were obtained from the Table 1 model. Control (non-manipulated wings): n = 20. Clipped wings: n = 14Back to article page