SynergyZA wrote:

I believe these are some rain spider nests. No adults in sight, but the male is apparently killed and stored inside for the little ones to feast on when they emerge.

This one is about the size of a rugby ball. and there were plenty of them around.

Lol.
These are community nest spiders (Erisidae Stegodyphus sp.).
And just for interest sake, rain spiders dont kill the male and store it for the babies to eat. Must be an old wives tale on the farms.