Hummingbirds hovering in front of a flower get lift not just from the down stroke of their wings as birds usually do but also from the up stroke, similar to insects. They are the only birds capable of flying this way. In this image you can see the start of the up stroke. Next time you see a hummingbird in flight, you can marvel at this unique ability. Title on the back of the card: Hovering Male Ruby-Throated Hummingbird Optional Foil Stamping on the front: Happy Birthday Inside Message: No message. The inside is blank. QR-code: The QR-code provides the recipient of your card a link to background information about the image on the front. Guide: Reading QR-codes with your smartphone. Size: Image: 4" x 6", hand-trimmed. Card: 5" x 6 ⅞" Envelope: 5 ¼" x 7 ¼" Each card is individually wrapped in a protective sleeve with its envelope. Material: Card: acid free paper, front side is embossed. Image: printed on archival grade Professional Endura Premier Color Paper from Kodak with a silk surface finish. Fingerprint and smudge resistant. Made in the U.S.A.
