This printable crossword puzzle on the topic of Ecology & Evolution has 12 clues. Answers range from 4 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
gives live birth and has fur
has damp skin
no backbone
backbone
uses gills to breathe
has wings and feathers
smallest classification group
cold blooded and lives on land
jointed legs
flying to a warmer or cooler climate
resting in the winter
largest classification system