This is the species that is used as THE cultivated walnut tree. It has pinnately compound leaves with about 7 alternate leaflets, larger towards the tip or terminal end.
Humans have enjoyed these nuts for so long that in many languages the word for nut is a word for THIS nut. Its original range is long forgotten, but it is grown across Eurasia, with China being the largest exporter for the worldwide market.
A low-growing “trefoil” weed of lawns and disturbed, nitrogen-poor soil, distinguished by its tiny hop-like yellow flower clusters, pointed tips on each leaflet, and the terminal leaflet on a longer stalk or petiole
This black-white-and-grey bird points its slender bill downwards – or tilts it comically upwards – as it spirals face-first down tree trunks and round and round branches, searching for insects to devour