Diane McAllister / Japanese Macaque (Macaca fuscata) biting needles from tree branch while sitting in hot spring in Jigokudani, Japan, January

Jack Dykinga / Cactus (Acanthocereus tetragonus) amid flowering Flaveria (Flaveria anomala) and Pink Floss Plant (Ageratum sp), Laguna Madre, Mexico, Central America

Johannes Melchers/ BIA / Yellow-chevroned Parakeet (Brotogeris chiriri) feeding on Silk Cotton Tree (Ceiba speciosa) seed, Bolivia

Jen Guyton / Thorny trunk of a cultivated silk floss tree (Chorisia speciosa), originally from South America, in Pietermaritzburg, South Africa.

Pascal Pittorino / Silk Floss tree flower and fruit (Ceiba speciosa) against a blue sky in botanic garden, Hyeres les palmiers, Var, Provence, France, November

Pascal Pittorino / Silk Floss tree flowers and fruits (Ceiba speciosa) against a blue sky in botanic garden, Hyeres les palmiers, Var, Provence, France, November

Yva Momatiuk & John Eastcott / Silk Floss Tree (Ceiba speciosa) with sharp spines on trunk, California

Konrad Wothe / Lupuna tree (Chorisia insignis) in lowland rainforest, Panguana Reserve, Huanuca province, Amazon basin, Peru.

Konrad Wothe / White Silk Floss Tree (Chorisia insignis) in lowland rainforest, Panguana Nature Reserve, Peru

Konrad Wothe / White Silk Floss Tree (Chorisia insignis) in rainforest and starry night sky, Panguana Nature Reserve, Peru

Konrad Wothe / White Silk Floss Tree (Chorisia insignis) at night, Panguana Nature Reserve, Peru

Bryan and Cherry Alexander / Two snowshoes, made from larch frames strung with sinew and dental floss by a cree woman from Mistasini. Quebec, Canada.