Fast flying (some can fly up to 35 miles an hour) and they love petunia necter!   Depicted beautifully on pages 24-25 of "Butterflies and Moths" (Golden Books/ Western Publishing Co, 1993)  Original artwork, painted in oil on  paper, 15" x 20.5" and signed - a two-page spread that will look lovely framed.   NOTE: purchase 2 or more interior illustrations from this book and shipping is free (I will refund your shipping costs after purchase)