Figure 13 from Charles Darwin's The Expression of the Emotions in Man and Animals. Caption reads "FIG. 13.—Swan driving away an intruder. Drawn from life by Mr. Wood." Author's signature is at bottom left. See also figures 9-15 and 18 by the same author, especially figure 12 of a hen driving away a dog.
Date Published in 1872
Source Scanned from 1965 version with foreword by Konrad Lorenz published by University of Chicago Press
Author Mr. T. W. Wood ("I am also greatly indebted to Mr. T. W. Wood for the extreme pains which he has taken in drawing from life the expressions of various animals." - p. 26)
Source: https://commons.wikimedia.org/wiki/File:Expression_of_the_Emotions_Figure_13.png

The mute swan (Cygnus olor) is a species of swan and a member of the waterfowl family Anatidae. Cygnus olor is native to much of Eurasia, and (as a rare winter visitor) the far north of Africa. Cygnus olor is an introduced species in North America, Australasia and southern Africa. The name 'mute' derives from it being less vocal than other swan species.