Possible Clues:

• Goose that may nest in lava rock
• Housewife Leakes of 'The Real Housewives of Atlanta'
• State symbol with a reduplicative name
• 15-Across symbol
• Goose river
• "The Real Housewives of Atlanta" star Leakes
• Leakes of 'Real Housewives' fame
• 50th state bird
• Flier not found in 49 states
• Bird so named because of its call