Red Crossbill Loxia curvirostra

– medium-sized passerine, slightly larger than Common Chaffinch
– diurnal migrant
– migrates singly or in small to medium loose flocks

– seven ecomorphs with different measurements and ‘call types’ described in Europe so far (ROBB 2000)
– every ecomorph is thought to have one distinct flight and one corresponding excitement call
– mismatched calls are thought to be very rare exceptions
– much variation in flight calls in some ‘call types’
– juveniles flight calls show obvious plasticity, but just for a short period of time
– calls learned from parents or other birds near nest
– ecomorphs with wrong call types (even of other crossbills species) are rare exceptions
– more ‘call types’ seem to occur, but nothing is yet published to proof that


Red Crossbill Loxia curvirostra, AD M
BIF2013, 01/03/2014, Werdauer Forst, Germany, Jens Halbauer
– AD M unmarked strawberry red exept for blackish wings and tail and light grey undertail coverts


Red Crossbill Loxia curvirostra, M
BIF2144, 14/02/2018, Rostock, Germany, Roland Neumann
– conspicuously long and pointed wings
– dark underwing coverts


Red Crossbill Loxia curvirostra, M
BIF2144, 14/02/2018, Rostock, Germany, Roland Neumann
– note different shape of the tail when fanned out


Red Crossbill Loxia curvirostra, F
BIF2134, 03/08/2013, Hof, Germany, Mathias Putze
– F greyish with olive on breast and upper belly
– in straight flight rather short, distinctly forked tail
– fairly large-headed


Red Crossbill Loxia curvirostra, F
BIF2135, 03/08/2013, Hof, Germany, Mathias Putze
– large bill


Red Crossbill Loxia curvirostra, M
BIF2136, 06/02/2018, Rostock, Germany, Roland Neumann
– in M the blackish wings and tail are contrasting to the shining red rump
– reasonable aging in flight is impossible


Red Crossbill Loxia curvirostra
BIF2137, 06/02/2018, Rostock, Germany, Roland Neumann
– dense flocks unsually consisting of both sexes

type A


Red Crossbill Loxia curvirostra, type A, flight call
BIF1997, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type A, flight call
BIF1996, 16/07/2017, Terpitz, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type A, flight call
BIF1987, 12/02/2014, Werdauer Forst, Germany, Patrick Franke

type B


Red Crossbill Loxia curvirostra, type B, flight call, excitement call
BIF2020, 26/04/2017, Garmisch-Partenkirchen, Germany, Michèle Peron


Red Crossbill Loxia curvirostra, type B, flight call
BIF2021, 26/04/2017, Garmisch-Partenkirchen, Germany, Michèle Peron

type C


Red Crossbill Loxia curvirostra, type C, flight call
BIF1995, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type C, excitement call, flight call
BIF1988, 07/03/2014, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type C, AD F, excitement call
BIF1989, 07/03/2014, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type C, flight call
BIF1990, 17/02/2015, Boubin, Czech Republic, Patrick Franke


Red Crossbill Loxia curvirostra, type C, flight call
BIF1991, 17/02/2015, Boubin, Czech Republic, Patrick Franke


Red Crossbill Loxia curvirostra, type C, AD M, flight call
BIF1992, 17/02/2015, Boubin, Czech Republic, Patrick Franke


Red Crossbill Loxia curvirostra, type C, probably 1CY, flight call
BIF1999, 14/06/2015, Kerið, Iceland, Patrick Franke


Red Crossbill Loxia curvirostra, type C, flight call
BIF2018, 13/08/2017, Sachsendorf, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type C, flight call
Goldcrest Regulus regulus, flight call

BIF1986, 02/12/2014, Werdauer Forst, Germany, Patrick Franke

type D


Red Crossbill Loxia curvirostra, type D, 1CY, flight call
BIF2000, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type D, flight call
BIF2001, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type D, flight call
BIF2002, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type D, flight call
BIF2003, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type D, flight call
BIF2004, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type D, flight call
Red Crossbill Loxia curvirostra, type C, flight call

BIF2005, 01/03/2014, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type D, flight call
BIF2006, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type D, AD M, flight call
BIF1998, 01/03/2014, Werdauer Forst, Germany, Patrick Franke

type X


Red Crossbill Loxia curvirostra, type X, flight call
BIF2007, 12/02/2014, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type X, flight call
BIF2011, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type X, 1CY, flight call
BIF2012, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type X, JUV, flight call
BIF2009, 01/03/2014, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type X, JUV, flight call
BIF2010, 18/03/2014, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type X, AD M, flight call
BIF2008, 13/08/2014, Werdauer Forst, Germany, Patrick Franke

type ‘ISO’ (following Julien Rochefort)


Red Crossbill Loxia curvirostra, type ISO, flight call

BIF1993, 14/07/2017, Werdauer Forst, Germany, Patrick Franke


Red Crossbill Loxia curvirostra, type ISO, flight call
BIF1994, 14/07/2017, Werdauer Forst, Germany, Patrick Franke

mixed flocks

Red Crossbill Loxia curvirostra, type A C D X, flight call
BIF2015, 14/07/2017, Werdauer Forst, Germany, Patrick Franke

Red Crossbill Loxia curvirostra, type A C D X, flight call
BIF2016, 14/07/2017, Werdauer Forst, Germany, Patrick Franke

Red Crossbill Loxia curvirostra, type A C D, flight call
BIF2014, 14/07/2017, Werdauer Forst, Germany, Patrick Franke

comparison species:
Two-barred Crossbill (v) (a)
Scottish Crossbill (v) (a)
Parrot Crossbill (v) (a)
Tree Sparrow (a)
Common Redpoll (a)
Pine Grosbeak (v)
Hawfinch (v)

#songbird #passerine #finch

#ornithology #birdmigration #birdID #birdguide #birding #birdwatching #birdsound #westernpalearctic #europe #vismig #flightcalls #middleeast #northernafrica #workinprogress

Reference:
Robb M. S. 2000, Introduction to vocalizations of crossbills in north-western Europe, in Dutch Birding 22, Santpoort-Zuid