Editing Juglans (section)

===Walnut as wildlife food plants===
Walnut species are used as food plants by the [[larva]]e of some [[Lepidoptera]] species. These include{{Citation needed|date=October 2007}}:
* [[Brown-tail]] moth (''Euproctis chrysorrhoea'')
* ''[[Coleophora]]'' case-bearers (moths) ''C. laticornella'' (recorded on ''J. nigra'') and ''C. pruniella''.
* [[Common emerald]] (a geometer moth) (''Hemithea aestivaria'')
* [[Saturnia pavonia|Small emperor moth]] (''Pavonia pavonia'')
* [[The engrailed]] (a geometer moth) (''Ectropis crepuscularia'')
* [[Walnut sphinx]] moth (''Amorpha juglandis'')
* [[Catocala neogama|The bride]] (a moth) (''Catocala neogama'') &ndash; [[nominate subspecies]] on butternut and others, ''C. n. euphemia'' on Arizona black walnut, perhaps Texas black walnut and others.

The nuts are consumed by other animals, such as mice and squirrels.

In California (US) and Switzerland, crows have been witnessed taking walnuts into their beaks, flying up to 60 feet or so in the air, and dropping them to the ground to crack the shells and eat the nut inside.<ref>{{cite journal |last1=Cristol |first1=Daniel A. |last2=Switzer |first2=Paul V. |title=Avian prey-dropping behavior. II. American crows and walnuts |journal=Behavioral Ecology |date=1 May 1999 |volume=10 |issue=3 |pages=220–226 |doi=10.1093/beheco/10.3.220 |doi-access=free }}</ref>