Related Clues:

• There are two, as the expression goes, in each of 16- and 55-Across
• Loons and cuckoos
• Tweeters
• Thunder ____(UBC Gridders )
• Builders of nests
• Egg-laying vertebrates
• Offers to capture rebel leader and those taking flight
• Threat in a 1963 Hitchcock film
• “Edward, I thought I said no more ____” (Twelve Days of Christmas [Correspondence], John Julius Norwich (seventh day))
• Offers to grab Romeo's tits, say
• Owls and eagles
• Flying creatures
• Jays, e.g
• Pigeons and pelicans
• A volery of ___