I've found a lot of C. impressa in the night, they like to go to the lights. Sadly i've never had one that laid eggs before, but something i noticed about them is that they are really bad at taking off their wings, the most of the times i see them trying to take their wings off but it never works so if they stay with their wings that probably doesn't mean that they're not fertile.
Species i'm Keeping:
Camponotus Floridanus, Camponotus Tortuganus, Brachymyrmex Obscurior, Unidentified species, Tetramorium Bicarinatum, Cyphomyrmex Rimosus,
Dorymyrmex Bureni, Hypoponera Sp, Pheidole navigans, Pheidole megacephala, Solenopsis Invicta, Cardiocondyla Venustula, Cardiocondyla Sp,
Unidentified species of Termites.