The images show a small Bird-dropping spider waiting patiently on a leaf for passing prey. The first image shows the rear view which appears to be camouflaged with face-like features including two ears, eyes and a mouth. These spiders usually sit with a slightly elevated front end posture and with their legs drawn up around their eyes (as seen in the third and fourth images) leaving just enough space between the legs to peer through. Thanks to Marcus for the initial sighting.