Introduction A dinosaur normally carries spikes or plates along its back; this one replaces that entire ridge with seven raised...

Introduction A vase can widen dramatically through its lower body, but its neck must contract without producing six visible corners....

Introduction A tiger cub needs its forehead stripes to converge toward the nose rather than run as parallel bands across...

Introduction A rabbit’s ears can hang below its jaw while the head remains upright, so their attachment line matters as...

Introduction An elephant’s trunk starts broad at the face and narrows before it curves, so a straight crocheted tube will...

Introduction A panda’s black eye patches must frame the eyes without touching the ears or the face loses its characteristic...

Introduction A daisy square fails visually when its flower center shifts even half a petal toward one corner, because a...

Introduction A hedgehog’s quills cannot cross onto its muzzle, so the brown spine line has to curve around both tiny...

Introduction A frog’s eyes need to rise above its skull; flatten them into the face and the entire amphibian silhouette...

Introduction A chick’s comb is not normally taller than its face, but this three-lobed red crest has to remain visible...