I’m not actually 100% sure of the identification of this sulphur. It may be an orange sulphur (Colias eurytheme) but it’s hard to tell for sure from the underside of the wings. It’s a sulphur, anyway, subfamily Coliadinae. I’ve had a hard time getting a good photograph of one, as they are quite shy and often don’t land when I’m near by. So, I was pleased to get this photo and a few others today. It’s a pretty little butterfly and I love seeing them on the flowers in the yard.