Usually found in the Americas from Argentina to the State of Texas, the Phoebis sennae butterfly, or Cloudless Sulphur, is also periodically seen throughout central California and clear on up into Ontario, Canada.

Crescent is worked in long, sweeping rows from the cast on edge, through the lace portion, and straight on to the short-rows that shape it into a crescent before binding off.

Yarn: Aran weight; 225 [300, 375, 450] yards.
Model: Teresa Ruch Designs Shanghai in second to largest size. 227 yards in 4.4 ounces. 100% bamboo rayon.
Gauge: 15 sts to 4 inches (10 cm) in lace pattern, blocked.
Needles: US 8 (5 mm).
Finished size: Finished size depth at widest point x length at inner edge/length at outer edge: 8 x 50/66 [8.75 x 60/79, 9.75 x 69/91, 10.5 x 79/104] inches; 20.5 x 127/167.5 [22 x 152.5/200.5, 25 x 175/231, 26.5 x 200.5/264] cm
Notions: 2 stitch markers required; cable needle optional

Skills: k2tog, ssk, YO, left- and right-leaning 2x2 cable, short rows
Stitch instructions: Charted and written.

This pattern is listed on Ravelry.