Published in Journal für Ornithologie, in 1876, in volume 24, pages 89-91

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Published in Journal für Ornithologie, in 1921, in volume 69, pages 259-266

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Published in Journal für Ornithologie, in 1889, in volume 37, pages 326-328

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Published in Journal für Ornithologie, in 1890, in volume 38, pages 129-131

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Published in Journal für Ornithologie, in 1890, in volume 38, pages 131-134

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Published in Journal für Ornithologie, in 1871, in volume 19, pages 234-237

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Published in Journal für Ornithologie, in 1871, in volume 19, pages 237-239

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Published in Journal für Ornithologie, in 1875, in volume 23, pages 113-118

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Published in Journal für Ornithologie, in 1873, in volume 21, pages 51-54

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Published in Journal für Ornithologie, in 1897, in volume 45, pages 359-361

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Published in Journal für Ornithologie, in 1897, in volume 45, pages 361-362

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Published in Journal für Ornithologie, in 1902, in volume 50, pages 131-134

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Published in Journal für Ornithologie, in 1894, in volume 42, pages 233-234

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Published in Journal für Ornithologie, in 1874, in volume 22, pages 90-92

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Published in Journal für Ornithologie, in 1905, in volume 53, pages 558-560

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Published in Deutsche Entomologische Zeitschrift, in 1921, in volume 1921, issue 2, pages 118-119

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Published in Journal für Ornithologie, in 1899, in volume 47, pages 417-418

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Published in Journal für Ornithologie, in 1899, in volume 47, pages 289-290

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Published in Journal für Ornithologie, in 1897, in volume 45, pages 195-196

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Published in Journal für Ornithologie, in 1896, in volume 44, pages 95-96

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Published in Journal für Ornithologie, in 1911, in volume 59, pages 707-714

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Published in Journal für Ornithologie, in 1887, in volume 35, pages 221-222

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Published in Journal für Ornithologie, in 1898, in volume 46, pages 138-139

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Published in Journal für Ornithologie, in 1902, in volume 50, pages 127-131

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Published in Journal für Ornithologie, in 1902, in volume 50, pages 125-127

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Published in Journal für Ornithologie, in 1903, in volume 51, pages 542-543

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Published in Journal für Ornithologie, in 1908, in volume 56, pages 303-304

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Published in Journal für Ornithologie, in 1908, in volume 56, pages 300-302

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Published in Journal für Ornithologie, in 1908, in volume 56, pages 297-300

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Published in Journal für Ornithologie, in 1908, in volume 56, pages 295-297

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Published in Journal für Ornithologie, in 1911, in volume 59, pages 170-173

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Published in Journal für Ornithologie, in 1911, in volume 59, pages 164-168

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Published in Journal für Ornithologie, in 1911, in volume 59, pages 168-170

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Published in Journal für Ornithologie, in 1906, in volume 54, pages 152-154

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Published in Journal für Ornithologie, in 1906, in volume 54, pages 157-158

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Published in Journal für Ornithologie, in 1906, in volume 54, pages 154-157

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Published in Journal für Ornithologie, in 1904, in volume 52, pages 566-570

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Published in Journal für Ornithologie, in 1905, in volume 53, pages 556-558

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Published in Journal für Ornithologie, in 1909, in volume 57, pages 107-108

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Published in Journal für Ornithologie, in 1909, in volume 57, pages 108-110

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Published in Journal für Ornithologie, in 1909, in volume 57, pages 502-503

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Published in Journal für Ornithologie, in 1909, in volume 57, pages 503-504

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Published in Journal für Ornithologie, in 1909, in volume 57, pages 230-232

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Published in Journal für Ornithologie, in 1909, in volume 57, pages 226-230

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Published in Journal für Ornithologie, in 1909, in volume 57, pages 232-236

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Published in Journal für Ornithologie, in 1906, in volume 54, pages 323-324

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Published in Journal für Ornithologie, in 1906, in volume 54, pages 324-325

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Published in Journal für Ornithologie, in 1907, in volume 55, pages 162-164

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Published in Journal für Ornithologie, in 1910, in volume 58, pages 407-409

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Published in Journal für Ornithologie, in 1910, in volume 58, pages 413-416

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