Crossword clues for Birds. 4 letters:BIRDSomething for the watchers.BIRDRobin, for oneBIRD20 Across, for exampleBIRDSparrow or crowBIRDOne concerned with nest eggsBIRDCapercaillie or towhee.BIRDCanary or cardinalBIRDMartin or swiftBIRDT-__BIRDGrouse or snipeBIRDOne word in the 10 longest answers, if one letter is changedBIRDOne in a flockBIRDCeltic great LarryBIRDTraffic signal?BIRD#33 for the CelticsBIRDAviary's occupantBIRDBill ownerBIRDFeathered friendBIRD39-Down, e.g.BIRDWord with 15-DownBIRDFlock memberBIRDBlue jay or orioleBIRDPlaneBIRDEagle or egretBIRD91 Down is oneBIRDEarly Antarctic aviator*BIRDRaven or robinBIRDTwitter producerBIRDWhat a U.K. hobbyist called a "twitcher" hopes to seeBIRDCrane or cuckooBIRDFlying egg-layerBIRDDuck, sayBIRDOriole or cardinalBIRDModern-day dinosaurBIRDParrot or sparrowBIRDSee 19-AcrossBIRDDinosaur descendantBIRDLarry who may leap for a layupBIRDCharlie Parker's nicknameBIRDCock, but not bullBIRDNest builderBIRDWord that can precede the first words of 20-, 37- and 54-Across, and 11- and 33-DownBIRDAudubon subjectBIRDCeltic heroBIRDUSA Dream Team co-captainBIRDPhoenix, in mythBIRD*See 29-AcrossBIRDFinch or falconBIRDParker's nicknameBIRDWarbler.