Other crossword clues for answer "NESTING"NESTINGFitting one within anotherUp a tree, perhapsAvian activityWith 68-Across, each successive one of a set graphically depicted by this puzzle's circlesFitting tightlyLike stored Russian dollsBuilding a tree house?Spring activity in the avian world.Fitting snugly.Fledgling's delightAt home, as a hoopoeNidificationAvine activityFitting one inside the otherLike some birds or dollsInstinctive behavior for a mother-to-beLaying laying foundations