bird's nest vs covey

bird's nest

• A structure built by a bird as a place to incubate eggs and rear young. 

• Any of several plants having some resemblance to the typical nest of a bird, eg, wild carrot (Dauca carota) 

• Any tangle of fibers resembling a typical nest of a bird. 

covey

• A brood of partridges, grouse, etc. 

• A party or group (of persons or things). 

• Coordinate terms: flock, gaggle, host 

• A group of 8–12 (or more) quail. 

• To brood; to incubate.