"Pam Moore" wrote in message
...

They are baby garden spiders which are fascinating to watch. When
disturbed they spread out as you saw and then cluster together
again.
Left alone they will develop into those big garden FRIENDS which
have
the white cross on their "backs". You are privileged to have seen
them and to have them in your garden.

Pam in Bristol

For the first time this year, I've had several "masses" of them
attached to the inside of the greenhouse.

Iris McCanna