The Tree Sparrow (Passer montanus) is currently on the UK Red List of conservation concern. Despite recent signs of recovery, this status is due to a severe population decline—over 93% between 1970 and 2008—making it one of the UK’s most threatened birds.  Bug Woman - Adventures in London +3

Key Facts on Red List Status:

• Listing: Classified as Red under the Birds of Conservation Concern 5 (2021) and a Priority Species under the UK Post-2010 Biodiversity Framework.

• Decline Cause: Population crashes, largely due to agricultural changes, specifically the loss of winter stubble fields and increased herbicide use.

• Habitat: Unlike the Urban House Sparrow, they prefer farmland, hedgerows, and woodland edges.

• Range Shrinkage: Populations are largely confined to eastern/southern England and parts of Scotland.

• Recovery: While still red-listed, some recent data suggests populations are beginning to stabilize or increase, with an estimated 39% increase in some reports between 1995-2023.

• Global Status: While critically threatened in the UK, the global status of the tree sparrow is listed as "Least Concern".  The Wildlife Trusts +7

Identification Tips:

• Appearance: Distinctive chestnut-brown crown and nape, white cheeks with a prominent black spot, and a black bib.

• Size: Slightly smaller than a house sparrow.

• Behavior: Generally less confident than house sparrows and rare in city centers, often seen in small breeding colonies or larger winter flocks. RSPB +4

Conservation efforts, including providing suitable nest boxes (28mm entrance holes) in rural areas, are crucial to their recovery.