Butterfly eggs.

I think this is a small white laying a single egg on my nasturtiums.  
On the right of the picture are large white butterfly caterpillars that were hatched yesterday. The large white lay eggs in little groups.click here to see them as eggs https://www.blipfoto.com/entry/2993869924675358019/edit
The large white caterpillars have a dark head and develop obvious stripes as the grow. The small white caterpillars are a light green and look more plump.