Yesterday, two more Monarch's came out of their chrysalis (hatched doesn't seem the right word but I am sure someone will tell me what is).
These were both outside and when I noticed them in the afternoon one was in distress on the ground. I lifted it up and put it on a leaf - on checking later I noticed a Praying Mantis on it. On further investigation I discovered it only had one leg.
I despatched it to end its' suffering (assuming butterflies do suffer) and have realised that the Mantis did the damage.
This morning there was one more butterfly that had emerged - I left it for a short while and when I went back a Praying Mantis was close by so I removed the leaf complete with butterfly and put it on the outside table. It has since flown away.
I think there are another four chrysalises (could be more) so will watch them carefully. I have always rescued any Praying Mantis that has been in the wrong place but, in future, they will be disposed of.
It is a cruel, hard world out there.