Red Crossbills, are on the RARE list [seen fewer than 10 times since 1970] of the Birds of Central Park checklist .
Yesterday, Aug 31, 2012, at 9:00 AM, Jacob Drucker wrote on eBirdsNYC:
At 6:35 this morning I has a group of 6 large finches with relatively large bills, long wings and notched tails giving 'kip kip' calls fly over the lake moving west, viewed from Balcony Bridge. Though seen/heard for only a few seconds, RED CROSSBILL fits the bill. A search of the pines in Strawberry Fields immediately after did not turn up the birds.
Today,Mike Bryant saw them again. He wrote [again, on eBirdsNYC] ::
9/1/2012 8:27 AM,
Still in the park. Flock feeding in hemlocks by transvers road just west of the castle visible from round fenced area by castle steps going down to Shakespeare garden.
photo of a Red Crossbill by LLOYD SPITALNIK - Madison CT 12/27/07