{"refrec":{"BRefID":6270,"RR":"<b>Piersma, T.</b> (2000). Age asymmetries in the aerial display of little gulls <i>Larus minutus</i> = Leeftijdsverschillen in de luchtbalts van dwergmeeuwen <i>Larus minutus</i>. <i>Atlant. Seabirds 2(2)</i>: 57-67","BEntID":6270,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Atlant. Seabirds 2(2)</i>: 57-67","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Piersma, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Piersma, T.","Englishabstract":"Aspects of age differences in the aerial display of Little Gulls <i>Larus minutus</i> are described based on fieldwork carried out in May 1983 in the Lauwersmeer area, The Netherlands. Aerial displays occur when an initiator or 'sender' approaches a 'receiving' individual. The sender initially makes (individually identifiable) kay notes, followed by several ke-kèh repeats. Once the sender has approached the receiver to within a  few meters, it increases flight speed, jerks up the head to almost a vertical position whilst starting to call a repeated ke-kôo. The head-up part of  the display is rounded off with a short glide over the receiver, but often the  display is aborted somewhere along the sequence. This is especially the case when immatures are the initiators. Immatures seem particularly keen to exercise  the display, and when doing so preferentially act towards adults. During display  flights between adults, receivers tended to respond with their own display flights. However, in aerial interactions initiated by immatures the receivers  tended to either flee or to retaliate by attack. I suggest that the aerial  display presents a compound quality signal (possibly derived from aerial  mosquito-catching movements), that requires much physical and social practising,  even during the immature stages of life.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Age asymmetries in the aerial display of little gulls <i>Larus minutus</i> = Leeftijdsverschillen in de luchtbalts van dwergmeeuwen <i>Larus minutus</i>","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2024-12-10 01:33:01.897972","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2000,"MonPub":null,"DateUpdate":"2017-09-05","DateCreate":"2001-02-21","SecASFANote":"Age differences in aerial display of <i>Larus minutus</i>","ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":6270,"PubliDate":2000,"Pagination":"57-67","XtraPublOfAnaID":null,"ISBN":null,"Volume":"2","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45223,"SerRR":"Atlantic Seabirds. 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