Markus Varesvuo / Parrot Crossbill (Loxia pytyopsittacus) male feeding on pinecone, Uto Finland September

Donald M. Jones / Red Squirrel (Tamiasciurus hudsonicus) pinecone food cache, Jasper National Park, Alberta, Canada

Nature Production / Pinecone fish {Monocentris japonica} glowing (bacteria cohabiting on jaw are glowing) captive, Japan

Nature Production / Japanese Black Pine {Pinus thunbergii} old pinecone, Japan

GEORGETTE DOUWMA / Pineconefish {Monocentris japonica} Seattle Aquarium, USA. Has luminous bacteria in light organ at corners of mouth.

GEORGETTE DOUWMA / Pineconefish {Monocentris japonica} Seattle Aquarium, USA. Has luminous bacteria in light organ at corners of mouth.

Michael Quinton / Red Squirrel (Tamiasciurus hudsonicus) feeding on Lodgepole Pine (Pinus contorta) pinecone in the fall, Idaho