night of the seagulls (1975)

aka La noche de las gaviotas.
"The pretty girls when they die they become seagulls."
Dr. Henry Stein and his wife Joan (Víctor Petit & María Kosty) arrive in a small fishing village, to take up his position as GP. Their arrival coincides with the return of the Templar's who rise every seven years to haunt the village, and claim sacrificial offerings.
The Knight Templar's return in this atmospheric chiller, the fourth and weakest installment of the Blind Dead series.