Owl
Seen or heard during daylight - bad luck
Looking into an owl's nest - sadness for life
Heard hooting by a pregnant woman - baby is a girl
Oyster
Oysters should only be eaten in months with an R in them
Aphrodisaic properties (dating back to Roman times)
Carrying an oyster shell - good luck
Peacock
Revered by Hindus as sacred
Greek mythology - tail consists of the eyes of the giant 'Argus'
Peacock feathers indoors - bad luck
Hearing a peacock cry - storms approaching
Pig
Once worshipped in Crete and Egypt
Crossing your path - unlucky
Running with straw in it's mouth - storms approaching
Driving pigs indoors On Beltane morning - good omen
Porpoise
Harbinger of good luck
Seen swimming north - fine weather
Seen swimming south - bad weather
information sources:
"Dictionary of superstitions" by David Pickering
"The encuclopedia of superstitions" by Christina Hole