eastern cottontail: widely distributed in United States except northwest and far west regions
wood rabbit: common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)
quantum jump: (physics) an abrupt transition of an electron or atom or molecule from one quantum state to another with the emission or absorption of a quantum