Warbler seen & heard singing at Welney WWT reserve in tree by ditch/dyke at 10:00.
No interactions present.
Check the heavy bill. All finches have bills this shape. All warblers have thin, insect-eating bills.
Lat/Lng: 52.53, 0.28
OS grid ref: TL547949
Habitat: atop ~6m tall tree close to reedbeds & pools, with ditch/dyke on other side. Conditions: Sunny but windy.