A nestling is a young bird that has not yet learned to fly. = fledgling. a very young bird that cannot leave its nest because it is not yet able to fly
move or arrange oneself in a comfortable and cozy position; "We cuddled against each other to keep warm"; "The children snuggled into their sleeping bags"
If something such as a building nestles somewhere or if it is nestled somewhere, it is in that place and seems safe or sheltered. Nearby, nestling in the hills, was the children's home She nestled the eggs safely in the straw in Jim's basket
If you nestle or are nestled somewhere, you move into a comfortable position, usually by pressing against someone or against something soft. John took one child into the crook of each arm and let them nestle against him Jade nestled her first child in her arms. = snuggle