[f. EVE sb.1 + JAR.] = EVE-CHURR 2.

1

1789.  G. White, Selborne (1853), 356. A notion that the fern-owl or eve-jarr … is very injurious to weanling calves.

2

1883.  Hampsh. Gloss., Eve-jar, the goat-sucker.

3