Night Sixteen: In Which The World Has Ended

1) I am living in a post-apocalyptic society with a small group of survivors. We have made our home on the outskirts of a rainforest, near some caves. We gather fruits and berries to eat and at first have adequate supplies. As time (likely years) goes by, the climate is becoming less and less habitable, and food is scarcer. Our best scavenger (who is either an ape-like human or a human-like ape) is losing her eyesight and can no longer distinguish between fruits which are potable and those which are poisonous, so that we often can't even eat most of what she gathers for us. Eventually (likely after more years) we are living in an arid, barren desert, and resign ourselves to the fact that we won't survive much longer. Also at some point, we use hovercrafts.