Caspian Tern
Hydroprogne caspia

– largest tern, considerably larger than Common Black-headed Gull
– diurnal migrant, nocturnal movements recorded
– migrates singly, in small loose flocks or as family party (summer)


Caspian Tern Hydroprogne caspia, 1CY
BIF2169, 07/09/2017, Dornod, Mongolia, Mathias Putze


Caspian Tern Hydroprogne caspia, 1CY
BIF2170, 07/09/2017, Dornod, Mongolia, Mathias Putze
same as BIF2169


Caspian Tern Hydroprogne caspia, 1CY
BIF1246, 14/09/2011, Besh Barmag, Azerbaijan, Michael Heiß


Caspian Tern Hydroprogne caspia, 1CY
BIF2156, 03/10/2008, Rügen, Germany, Martin Grimm


Caspian Tern Hydroprogne caspia, 1CY
BIF2155, 03/10/2008, Rügen, Germany, Martin Grimm

BIF495_MPU_I1Q5007_130125_casptern_thai_pak-thale
Caspian Tern Hydroprogne caspia, 2CY
BIF0494, 24/01/2013, Pak Thale, Thailand, Mathias Putze

BIF494_MPU_I1Q4390_130124_casptern_thai_pak-thale
Caspian Tern Hydroprogne caspia, 2CY
BIF0495, 25/01/2013, Pak Thale, Thailand, Mathias Putze


Caspian Tern Hydroprogne caspia, AD BREED -> NBREED
BIF2171, 07/09/2017, Dornod, Mongolia, Mathias Putze


Caspian Tern Hydroprogne caspia, AD BREED -> NBREED
BIF2172, 07/09/2017, Dornod, Mongolia, Mathias Putze


Caspian Tern Hydroprogne caspia, AD BREED
BIF2157, 06/08/2010, Mongolia, Martin Grimm


Caspian Tern Hydroprogne caspia, AD BREED
BIF1388, 26/07/2015, Karrendorfer Wiesen, Germany, Roland Neumann


Caspian Tern Hydroprogne caspia, AD BREED -> NBREED (above), 1CY
BIF1244, 21/09/2016, Besh Barmag, Azerbaijan, Michael Heiß


Caspian Tern Hydroprogne caspia, AD
BIF1245, 21/09/2016, Besh Barmag, Azerbaijan, Michael Heiß


Caspian Tern Hydroprogne caspia,
BIF2173, 20/08/2017, Dornod, Mongolia, Mathias Putze

BIF496-3_PFR06726_2-11_110526_casptern-C_kz_rybachje
Caspian Tern Hydroprogne caspia, AD, call in flight
Common Tern Sterna hirundo, AD, call in flight

BIF0496, 26/05/2011, Rybachje, Kazakhstan, Patrick Franke


Caspian Tern Hydroprogne caspia, AD JUV call in flight
BIF2940, 22/07/2018, Karrendorfer Wiesen, Germany, Patrick Franke

comparison species:
Common Tern
Arctic Tern
Sandwich Tern

#seabird #seabirds

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