Hummingbirds Wall Calendar: Their colors are vibrant and radiant, they are among the smallest of birds and they can hover mid-air by rapidly flapping their wings 12 to 90 times per second. These photographs capture the fascinating speed and beauty of hummingbirds. All calendar pages are printed on FSC certified paper and use environmentally safe inks. UPC: 619344270064 EAN: 9781579000066