{"id":10517,"date":"2019-04-07T15:38:25","date_gmt":"2019-04-07T14:38:25","guid":{"rendered":"http:\/\/birds-in-flight.net\/?p=10517"},"modified":"2019-12-20T18:47:51","modified_gmt":"2019-12-20T17:47:51","slug":"eurasian-bittern-botaurus-stellaris","status":"publish","type":"post","link":"https:\/\/birds-in-flight.net\/?p=10517","title":{"rendered":"Eurasian Bittern
Botaurus stellaris<\/em>"},"content":{"rendered":"

>> GENERAL >>>>><\/strong><\/p>\n

– fairly large and stocky Heron, smaller than Grey Heron<\/a>
\n– nocturnal migrant
\n– migrates singly, occasionally in very small flocks<\/p>\n

>> VISUAL ID >>>>><\/strong><\/p>\n

\"\"<\/a>
\nEurasian Bittern Botaurus s. stellaris<\/em>, AD F<\/strong>
\nBIF2878, 08\/06\/2015, D\u00e4nkritz, Germany, Jens Halbauer
\n– rather stocky heron with owl-like plumage, base colour yellow brown like old reed
\n– comparatively short legs, the large greenish feet protruding the tail
\n– three generations of primaries indicating an AD bird<\/p>\n

\"\"<\/a>
\nEurasian Bittern Botaurus s. stellaris<\/em>, AD F<\/strong>
\nBIF2879, 08\/06\/2015, D\u00e4nkritz, Germany, Jens Halbauer
\n– upperwing with dark brown – reddish brown barring
\n– primary coverts darkest part of the wing
\n– sexed as F by greenish brown bare skin at the base of the bill and less contrasting dark cap and moustacial stripe<\/p>\n

\"\"<\/a>
\nEurasian Bittern Botaurus s. stellaris<\/em>, AD F<\/strong>
\nBIF2880, 12\/06\/2013, D\u00e4nkritz, Germany, Jens Halbauer
\n– throat with dark brown stripes
\n– Greater and median coverts form a somewhat paler wing panel<\/p>\n

\"\"<\/a>
\nEurasian Bittern Botaurus s. stellaris<\/em>, AD M<\/strong>
\nBIF2881, 11\/05\/2015, D\u00e4nkritz, Germany, Jens Halbauer
\n– note legs appear longer than usual due to damaged tail
\n– sexed as M by blueish bare skin at the base of the bill (only possible during breeding season)
\n– in M black cap and moustachial stripe tend to be more contrasting than in F<\/p>\n

\"\"<\/a>
\nEurasian Bittern Botaurus s. stellaris<\/em><\/strong>
\nBIF2882, 12\/06\/2013, D\u00e4nkritz, Germany, Jens Halbauer
\n– silhouette in twilight resembles Black-crowned Night Heron<\/a>, but note longer legs
\n– bill in level with body axis
\n– larger, heavier appearance and slower wingbeats than Black-crowned Night Heron<\/a><\/p>\n

\"\"<\/a>
\nEurasian Bittern Botaurus s. stellaris<\/em>, AD F<\/strong>
\nBIF2883, 02\/07\/2014, D\u00e4nkritz, Germany, Jens Halbauer
\n– compared to Purple<\/a> or Grey Heron<\/a> the neck is less sagging<\/p>\n

>> ACOUSTIC ID >>>>><\/strong><\/p>\n

– slightly downslurred<\/em>, very nasal<\/em> sounding, single calls
\n– energy centre at around 1,1kHz
\n– on average 3ms long
\n– rather invariable
\n– dense and even partials<\/em>
\n– gaps between calls sometimes a few seconds long<\/p>\nhttps:\/\/birds-in-flight.net\/wp-content\/uploads\/2019\/12\/BIF3133-1_GRU_1-00_20191113_ebitt-1-FC_AZE_p_20191113002500.mp3<\/a><\/audio>\n

\"\"<\/a>
\n– overview –
\n\"\"<\/a>
\nEurasian Bittern Botaurus s. stellaris<\/em>, calls in flight<\/strong>
\nBIF3133, 13\/11\/2019, Shirvan NP, Azerbaijan, Georg R\u00fcppel<\/p>\nhttps:\/\/birds-in-flight.net\/wp-content\/uploads\/2019\/12\/BIF3134-1_GRU_1-00_20191112_ebitt-1-FC_AZE_p_20191112161415.mp3<\/a><\/audio>\n

\"\"<\/a>
\n– overview –<\/em>
\n\"\"<\/a>
\n– detail –<\/em>
\nEurasian Bittern Botaurus s. stellaris<\/em>, calls in flight<\/strong>
\nBIF3134, 12\/11\/2019, Shirvan NP, Azerbaijan, Georg R\u00fcppel<\/p>\nhttps:\/\/birds-in-flight.net\/wp-content\/uploads\/2019\/03\/BIF2900-1_1-11_BOTSTE_FC_20180820_2200_Helgoland-Kringel_short-1.mp3<\/a><\/audio>\n

\"\"<\/a>
\n– detail –<\/strong><\/em>
\n\"\"<\/a>
\n– full overview –
\n– gaps between calls shortended –<\/strong><\/em>
\nEurasian Bittern Botaurus s. stellaris<\/em>, calls in flight<\/strong>
\nBIF2900, 20\/08\/2018, Helgoland, Roland Neumann<\/p>\nhttps:\/\/birds-in-flight.net\/wp-content\/uploads\/2019\/03\/BIF2899-1_PFR05969-1_1-11_110509_BIO_ebitt-stellaris-FC_cquail-coturnix-AV_bthroat-pallidogularis-S_kz_ertis-ort_MS-1.mp3<\/a><\/audio>\n

\"\"<\/a>
\n– detail –<\/em><\/strong>
\n\"\"<\/a>
\n– full overview –
\n– gaps between calls shortended –<\/strong><\/em>
\nEurasian Bittern Botaurus s. stellaris<\/em>, calls in flight<\/strong>
\nBIF2899, 09\/05\/2011, Ertis, Kazakhstan, Patrick Franke<\/p>\n

>> COMPARISON SPECIES >>>>><\/strong><\/p>\n

Purple Heron<\/a> (v) (a)
\nGrey Heron<\/a> (v) (a)
\nBlack-crowned Night Heron<\/a> (v) (a)
\nGreater Black-backed Gull (a)<\/p>\n

#waterbird<\/p>\n

#ornithology #birdmigration #birdID #birdguide #birding #birdwatching #birdsound #westernpalearctic #europe #vismig #flightcalls #vismig #flightcalls #middleeast #northernafrica #workinprogress<\/p>\n","protected":false},"excerpt":{"rendered":"

>> GENERAL >>>>> – fairly large and stocky Heron, smaller than Grey Heron – nocturnal migrant – migrates singly, occasionally in very small flocks >> VISUAL ID >>>>> Eurasian Bittern Botaurus s. stellaris, AD F BIF2878, 08\/06\/2015, D\u00e4nkritz, Germany, Jens Halbauer – rather stocky heron with owl-like plumage, base colour yellow brown like old reed … Continue reading Eurasian Bittern
Botaurus stellaris<\/em><\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":10519,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[135],"tags":[362],"class_list":["post-10517","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ardeidae","tag-eurasian-bittern-botaurus-stellaris"],"_links":{"self":[{"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=\/wp\/v2\/posts\/10517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10517"}],"version-history":[{"count":18,"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=\/wp\/v2\/posts\/10517\/revisions"}],"predecessor-version":[{"id":11553,"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=\/wp\/v2\/posts\/10517\/revisions\/11553"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=\/wp\/v2\/media\/10519"}],"wp:attachment":[{"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/birds-in-flight.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}