Black Spinybacked Orb Weavers: How to Identify -

Black Spinybacked orb weavers are just one coloration, most other members of this species have various other colors.

Black Spinybacked orb weavers: Identification.

Black Spinybacked orb weavers (Gasteracantha cancriformis) demonstrate distinct sexual dimorphism concerning the size. Females measure 5-9 mm in length and 10-13mm across, whereas males are 2-3 mm long and slightly narrower. All morphs have six abdominal spines; however, the coloration of these may vary from red to yellow or orange depending on location. Additionally, many occasionally boast white spots underneath their abdomens and colored legs.

The ebony coloring of the Black Spinybacked Orb Weaver can be advantageous in nabbing their prey; however, they become more exposed to predation due to their unthreatening pigmentation or design that fails at repelling aggressors.

Black Spinybacked orb weavers: Habitat.

The black Spinybacked orb weaver spider has made its home among woodland edges and shrubby gardens, as well as in Florida’s citrus groves. Known to frequent trees or their surrounding foliage, this species is often spotted nesting high above ground level.

Black Spinybacked orb weavers: Life Span.

This species of black Spinybacked orb weavers do not live very long. The lifespan only lasts until reproduction, usually in the spring following the winter when they hatched. Female Spinybacked orb weavers die after producing an egg mass, and males die six days after a complete cycle of sperm induction to the female.