I am seeing less and less Greenfinch at the park, they prefer to be in Kirk Lane or along the dirt track between the two parks, my last two visits I have heard them but not managed to see them. Hiding in the trees on the edge of the bowling green. Today they were feeding ( just one seen) with the rest of the birds on the last of the Yew berries.
Greenfinch populations declined during the late 1970s and early 1980s, but increased dramatically during the 1990s. A recent decline in numbers has been linked to an outbreak of trichomonosis, a parasite-induced disease which prevents the birds from feeding properly.
Read more at RSPB