When you can't get eggs you have blackberries and whinberries.
"The Man-Wolf and Other Tales" by Emile Erckmann and Alexandre Chatrian
Walked up the mountain, saw great quantities of whinberries; a delightful stream of water near the summit.
"A Journey to America in 1834" by Robert Heywood
Find the whinberries, and something may come of it!
"A Little Wizard" by Stanley J. Weyman