Young dark-coloured, with vermiculated marks on the chin, chest, and abdomen.
"Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2)" by George Grey
This species, in summer, is more grayish than the Rock Ptarmigan, and is very finely vermiculated with blackish.
"The Bird Book" by Chester A. Reed
Most of the specimens are faded, discolored, and do not have distinct brown vermiculations on the thighs.
"The Systematics of the Frogs of the Hyla Rubra Group in Middle America" by Juan R. León
It is ashy grey in colour, barred and vermiculated with black.
"The History of the European Fauna" by R. F. Scharff
Much paler and more heavily vermiculated above than No.
"Color Key to North American Birds" by Frank M. Chapman
XIII., Zygote in the motile stage (vermicule or ookinete).
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7" by Various
The upper side of the tail is vermiculated with whitish and the underside of the tail is black.
"An Annotated Check List of the Mammals of Michoacán, México" by Bernardo Villa R.
Why, cut it off, piece after piece,
And throw the tough cortex away,
And when you've marvelled on the wars
That wove their interior smoke its way,
Tear out the close vermiculate crease
Where death crawled angrily at bay.
"Homily" by Allen Tate