Referring Clues

• Wren or hen
• Shuttlecock
• N.B.A. M.V.P., 1984-86
• One filling the bill?
• Flier
• Feeder frequenter
• Country singer?
• Nest builder
• Cardinal, for one
• Robin or swallow
• Word with early or whirly
• Tweety ___ of Warner Bros. cartoons
• Charlie Parker's nickname
• Grackle or grosbeak
• Frequent flier
• Badminton projectile
• Dodo, for instance
• Audubon painting subject
• Former Celtics star Larry
• Heckle or Jeckle
• Nest egg protector
• Crane or kite
• See 19-Across
• Ostrich or owl
• Hawk or dove, e.g.
• Booby, e.g.
• Roadrunner, e.g.
• Swift, e.g.
• Robin, for one
• Martin or swift
• Celtic hero
• Audubon subject
• Word with 15-Down
• Feathered friend
• Bill owner
• 39-Down, e.g.
• Plane
• Grouse or snipe
• Eagle or egret
• 20 Across, for example
• 91 Down is one
• Winter migrator
• Titmouse, e.g.
• It fills the bill?
• Charlie Parker's sobriquet
• Boston Celtics legend, Larry
• Kookaburra, e.g.
• Loon or hoopoe
• Kite or crane
• Charlie Parker, to fans
• Frequent flier?
• Thanksgiving dinner focus, informally
• Frequent flier, really
• Boston legend
• One of the flock
• 1988 film about Charlie Parker
• Celtic great Larry
• Goose or loon
• Celtics legend
• Aircraft, informally
• Phoenix, in myth
• Seed eater
• Hawk or auk
• Condor or conure
• Nest protector
• Condor, for one
• Auk, for example
• Love ______
• Biopic directed by Clint Eastwood
• Rail or quail
• Swallow, e.g.
• Celtics great
• Robin or wren
• Crow or crane
• Robin, e.g.
• Celtics' legend
• Grackle or grouse
• Boston Celtics legend
• Ptarmigan, for one
• ___ call
• Fledgling
• Aviary's occupant
• Finch or flycatcher
• PBS has a big one
• Small singer
• Avian creature
• Dinosaur descendant
• Crane or cuckoo
• Hoopster Larry
• Larry who may leap for a layup
• #33 for the Celtics
• Larry of basketball lore
• Flock member
• Cardinal or oriole
• *See 29-Across
• Finch or falcon
• Larry of basketball fame
• 20-Across, e.g.
• Billie of "Dear John"
• Crane or cardinal
• Blue jay or oriole
• Wren, e.g.
• Hawk, e.g.
• 42-Across, e.g.
• T-___
• Diver, for instance
• 52-Across builder
• Rhea or emu
• Part of four NFL logos
• Frequent flier's respite
• Frequent tweeter
• Hawk or dove
• Bronx cheer
• Cardinal, e.g.
• What a tot might draw as an "m"
• Emu or owl
• One with a lot of tweets
• Animal aviator
• Many a sports team logo
• Tweeter in a tree
• Snuffleupagus's pal, to Snuffy
• NBA legend Larry
• Dove or robin
• Larry Robinson AKA The big ___
• Feeder visitor
• Swift or swallow
• ___ of paradise
• Twitter mascot
• Lark, e.g.
• Finch, e.g.
• Oriole, for one
• Snipe or thrush
• Sparrow, e.g.
• Nuthatch, for one
• Charlie Parker
• Feathery saxophonist?
• Bruce "___ on a wire outside my motel room"
• Charlie Parker nickname
• Fowl
• 1 under par that's ignored girlfriend ...
• Prison sentence - hawk, perhaps
• Person with a hobby who's happy to see one?
• Lark in Holloway?
• A two-way flier?
• Flier - spell in prison
• Two-way air traveller?
• Flying creature
• Egg-laying vertebrate
• Feathered animal
• One at a hen party?
• See 1 across
• Dawn chorus etc - book by Sebastian Faulks
• Swift sentence?
• Charlie "___" Parker - time inside
• Leader of seven animals migrating south in V formation
• Creature - time in prison
• Time when king's in command
• Walk in town to bone up on direct current period
• Frequent flyer
• Crane, for one
• Archaeopteryx descendant
• It can be fed from a feeder
• Loon or booby
• Word with "blue" or "whirly"
• Eagle or finch, e.g.
• Wren or robin
• Finch or sparrow
• Mavis in prison?
• Girl doing time
• Say English composer meets American composer in walk through London
• Time? It often flies
• See 20
• See 5 Down
• See 11
• See 17
• Charlie, 1960s-style girl: underwear accepted
• 6 20's notes from on high?
• Creature's time in cage
• See 23
• Time that flies
• Time for a lark, perhaps
• Swallow or sparrow, for example
• Member of a romantic pair
• Morning singer
• Builder of a 47 Across
• Booby or loon
• Raven, say
• Swift's time?
• Flyer's attempt to cross river
• Flier in prison?
• Heron or eagle
• Owl or osprey
• Eagle or oriole
• Snow ___ (Slang for a vacationing canuck )
• Robin, say
• Flier making an outright bid
• Owl or albatross
• Winged creature
• What Superman first looked like?
• Cardinal or blue jay
• See 3 Down
• Porridge for the canary, say?
• Twitter logo
• Certain flock member
• WNBA legend Sue or NBA legend Larry
• Paulie, e.g.
• One might tweet at dawn
• Sparrow, for example
• Cardinal or cormorant
• Dove or hawk, for example
• Tweety, e.g.
• Twitter producer
• Creature studied by an ornithologist
• 1988 biopic of Charlie Parker
• Eagle or kite
• What might come down to the wire?
• An Old World sparrow is one
• Something "in the hand" that's "worth two in the bush"
• Middle finger, with "the"
• Early Antarctic aviator*
• Parrot or sparrow
• One word in the 10 longest answers, if one letter is changed
• Raven or crow, for example
• Pigeon or peacock
• Seattle Storm star Sue
• One may tweet a lot
• Eagle or lark
• Robin or frogmouth
• Eagle or albatross
• Lark in Holloway?
• Twitter's logo
• Jay or oriole
• Animal on a Wingspan card
• It may be flipped in anger, with "the"
• Swallow or duck
• Loon or dodo
• Falcon, e.g.
• Early morning caller
• Twitter icon
• A two-way flier?
• One who tweets a lot
• Frequent flier?
• Cassowary or canary
• Toucan Sam or Donald Duck
• Two-way air traveller?
• One at a hen party?
• Oriole or wren
• Ornithologist's interest
• Tweety, Woodstock or Woody Woodpecker
• Nesting creature
• National Audubon Society subject
• With 41-Across, a hint to this puzzle's theme
• Blue-footed booby, for one
• Female flier?
• Kite, for one
• Heron, e.g.