Fauna
Plant

Persian Walnut

Juglans regia

Also known as English Walnut, Common Walnut, Carpathian Walnut, Madeira Walnut

Persian walnuts are stately deciduous trees prized across thousands of years for their valuable hardwood and nutrient-dense kernel crops. Dense aromatic foliage releases the allelopathic chemical juglone into surrounding soil, suppressing competitive root growth of many neighboring plant species. Mature crowns cast heavy shade across mountain valleys and pastoral foothills, supporting diverse birds and rodents that cache and disperse the heavy seeds.

DeciduousNut-bearingWind-pollinated
Persian Walnut reference1 / 7
(c) Ed Alverson, some rights reserved (CC BY), uploaded by Ed Alverson · cc-by
—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyPhotosynthetic
Predators
  • Eastern Grey Squirrel
  • Walnut Husk Fly
  • Codling Moth
ThreatsWalnut blight, fungal anthracnose, walnut husk fly infestations, habitat fragmentation
HabitatsTemperate deciduous forests, riparian corridors, mountain valleys, cultivated orchards
Life span100–250 years
Classification
  1. OrderFagales
  2. FamilyJuglandaceae
  3. GenusJuglans
  4. SpeciesJuglans regia
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Husks and moldy nuts contain toxins harmful to dogs and horses; never consume wild nuts based on app ID alone.
Why it is dangerous
Decomposing husks and fallen nuts readily harbor molds producing tremorgenic mycotoxins that cause muscle tremors and seizures in dogs and livestock.
How to recognize a risky encounter
Recognized by smooth rounded green husks turning black as they decay beneath the canopy.
What to do
Rake up and discard fallen husks in dog exercise areas, and avoid grazing horses near the root zone.
Responsible observation
  • Pet Safety: Keep dogs away from fallen rotting nuts, which foster toxic fungal molds.
  • Identification: Look for smooth grey bark and large pinnate leaves with 5 to 9 leaflets.
Related species
Help improve the field guideSomething wrong?

Report a name, category, or profile issue for review.

Checking your Fauna account…