Once you have located all the birds in the grid, the remaining letters will spell out another feathered friend.

TSENOEGIPQ
SWIFTKWAHU
VHNEVARSWA
UECCPTTSOI
LRAIRHDTLL
TORIROROLE
UNDUVTWRAL
RGSEOWSKWG
EHYERPSOSA
CORMORANTE

CORMORANT
HERON
PARTRIDGE
SWALLOW
CROW
NEST
PIGEON
SWIFT
DOVE
OSPREY
QUAIL
THRUSH
EAGLE
OSTRICH
RAVEN
VULTURE
HAWK
OWL
STORK

solution...