entrance hole
Way in gap
An entrance hole is an opening that allows entry into an enclosed space, typically referring to holes in birdhouses, nest boxes, or natural cavities that birds and small animals use to access their shelter: The entrance hole should be sized to admit chickadees but exclude larger birds.
The term appears most often in discussions of wildlife habitat and backyard birding, where hole diameter determines which species can enter.
- openingGap or start
- front doorPrimary household entry point
- portalImposing entrance or gate
- doorwayPassage into a room
- way inMeans of entry
burrow · cavity · threshold · tunnel · nest · hive · bee hive · keyhole · aperture · access · passage · den · lair · warren · gap · orifice · peephole · secret passage