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Robert Ridgway

Academy of Natural Sciences of Drexel University

282

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1686

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I.–Second Thoughts on the Genus Micrastur

2008 Ibis
- Robert Ridgway
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Description of a new Species of the Genus Empidonax from Guatemala.

2008 Ibis
- Robert Ridgway
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V.—Notes on three Guatemalan Birds.

2008 Ibis
- Robert Ridgway
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XVII.–Notes on the Genus Helminthophaga

2008 Ibis
- Robert Ridgway
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On Empidochanes fuscatus (Max.) and Empidonax brunneus, Ridgw.

2008 Ibis
- Robert Ridgway
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The Birds of North and Middle America. Part XI

1947
- Robert Ridgway
- Herbert Friedmann
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Diagnosis of a New Genus of Buteonine Hawks (Coryornis, gen. nov)

1925 The Auk
- Robert Ridgway
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In Memoriam: José Castulo Zeledón. (Born March 24, 1846-Died July 16, 1923)

1923 The Auk
- Robert Ridgway
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What Is Buteo rufescentior Salvin and Godman

1923 The Auk
- Robert Ridgway
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A Plea for Caution in Use of Trinomials

1923 The Auk
- Robert Ridgway
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