Related Clues:

• Ten S's fly into them
• What such as 14 down do not have
• A little bird tells me they's all there
• Sent South? That's for the birds
• Lay in them
• Bunnies' birthplaces
• Upholstered seats
• Bird hangouts
• Packs, as a set of mixing bowls
• Beds, at times
• Some convert into beds
• Treetop homes
• Fits snugly inside
• Resting places for frequent fliers?
• Frequent landing spots