Big difference between obese spiders and gravid spiders – an observation. 

There is a significant difference in the abdomen shape of gravid spiders than just plain old fat spiders. 

Dorsal aspect of the abdomen becomes raised as it’s swollen with eggs giving an overall bell shaped look to the back end. 

Very easy to see in Cyriopagopus species such as the Cyriopagopus minax pictured below – short, stubby and more ball shaped. 

This female has blocked off one entrance to her burrow and started webbing heavily – I expect her to drop an eggsac within the next few weeks. 

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