Published in Journal für Ornithologie, in 1920, in volume 68, pages 402-403

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Published in Journal für Ornithologie, in 1914, in volume 62, pages 168-169

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Published in Ornithologische Monatsberichte, in 1900, in volume 8, pages 22-23

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 424-426

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Published in Journal für Ornithologie, in 1907, in volume 55, pages 310-311

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Published in Journal für Ornithologie, in 1907, in volume 55, pages 308-310

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Published in Journal für Ornithologie, in 1907, in volume 55, pages 311-312

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Published in Journal für Ornithologie, in 1907, in volume 55, pages 472-475

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Published in Journal für Ornithologie, in 1914, in volume 62, pages 165-168

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Published in Journal für Ornithologie, in 1917, in volume 65, pages 389-395

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Published in Journal für Ornithologie, in 1918, in volume 66, pages 110-115

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Published in Journal für Ornithologie, in 1918, in volume 66, pages 115-118

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Published in Journal für Ornithologie, in 1918, in volume 66, pages 335-337

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Published in Journal für Ornithologie, in 1918, in volume 66, pages 234-239

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Published in Journal für Ornithologie, in 1918, in volume 66, pages 241-244

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Published in Journal für Ornithologie, in 1918, in volume 66, pages 239-241

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Published in Journal für Ornithologie, in 1921, in volume 69, pages 91-111

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Published in Journal für Ornithologie, in 1920, in volume 68, pages 401-402

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Published in Journal für Ornithologie, in 1920, in volume 68, pages 392-397

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Published in Journal für Ornithologie, in 1920, in volume 68, pages 390-392

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Published in Journal für Ornithologie, in 1920, in volume 68, pages 397-399

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Published in Journal für Ornithologie, in 1920, in volume 68, pages 236-241

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Published in Journal für Ornithologie, in 1920, in volume 68, pages 89-95

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Published in Journal für Ornithologie, in 1920, in volume 68, pages 84-85

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Published in Journal für Ornithologie, in 1921, in volume 69, pages 573-575

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Published in Journal für Ornithologie, in 1921, in volume 69, pages 465-466

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Published in Journal für Ornithologie, in 1921, in volume 69, pages 258-259

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Published in Journal für Ornithologie, in 1913, in volume 61, pages 167-169

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Published in Journal für Ornithologie, in 1913, in volume 61, pages 188-194

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 419-420

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 412-413

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 413-414

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 414-419

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 421-424

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Published in Journal für Ornithologie, in 1913, in volume 61, pages 395-397

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Published in Journal für Ornithologie, in 1910, in volume 58, pages 813-815

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Published in Journal für Ornithologie, in 1912, in volume 60, pages 117-120

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Published in Journal für Ornithologie, in 1912, in volume 60, pages 499-500

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Published in Journal für Ornithologie, in 1912, in volume 60, pages 494-495

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Published in Journal für Ornithologie, in 1912, in volume 60, pages 495-498

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Published in Journal für Ornithologie, in 1907, in volume 55, pages 469-470

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Published in Journal für Ornithologie, in 1907, in volume 55, pages 471-472

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Published in Journal für Ornithologie, in 1912, in volume 60, pages 314-318

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Published in Journal für Ornithologie, in 1911, in volume 59, pages 350-353

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Published in Journal für Ornithologie, in 1911, in volume 59, pages 353-356

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Published in Journal für Ornithologie, in 1917, in volume 65, pages 512-514

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 155-156

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Published in Journal für Ornithologie, in 1916, in volume 64, pages 161-164

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Published in Journal für Ornithologie, in 1918, in volume 66, pages 436-439

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Published in Journal für Ornithologie, in 1917, in volume 65, pages 235-240

Created: 2014-09-04, modified: 2014-09-04