The first photo is of a passion flower in bloom. The flower is approx. 2.5 inches in width. The little bee (Auguchlora Green Metallic Bee) is approx. 1/8 on an inch long.
The second photo is of a caterpillar (Gulf Fritillary) approx. 1/2 inch in length perched on a Passion flower leaf.
The third photo is as another poster has pointed out in fact a Queen Annes lace prior to blooming.
The fourth photo is a cu of a barbed wire fence.