From 2speccers2tools wiki

Some populations of Palm Canartrees began to grow extra large ovaries so males could better access the females. This would eventually lead to the evolution of the Canarhive, who has turned their reproductive systems into a shelter. The females of this species are multicellular, with a well developed skeleton to support their larger size and an extensive root system to obtain nutrients. The many feathery branches help gather sunlight while the beak flowers on top are where they develop their ovaries to release spores. Male Canarhives have hardly changed at all from their ancestors. Much like their ancestor, the male Canarhives have a semi-developed skeleton to help support their bodies and to act as muscle attachments. Males also continue to hunt small prey on the wing, with a simple eye to help chase down things as well as to avoid predators. While males can still use photosynthesis to gain energy, they primarily get it through eating other organisms instead. Female Canarhives have changed up the relationship with males by having a single fused ovary with entrances for males to fly into. The males have fleshy "digits" to help crawl around while inside this ovary as they rest from hunting. By sheltering inside the female's ovary, male Canarhives get covered in fertilized spores which will eventually fall off them when they fly around for food. Once they land, the spores will become new Canarhives, with males emerging from the ground early on while females stay rooted. Much like their ancestor, the Canarhives have a tolerance for radiation, since the Radfauna are present in the region.