Bird Identification Research Papers - Academia.edu (original) (raw)

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Separation of Common & Oriental Cuckoos in the field

• • by Clive F Mann
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  • Birds, Bird Identification, Bird Migration

A review of Rare Birds of North America.

• • by Rick Wright
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  • Birds, Bird Identification

A major challenge in the automated acoustic recognition of bird species is the audio segmentation, which aims to select portions of audio that contain meaningful sound events and eliminates segments that contain predominantly background... more

A major challenge in the automated acoustic recognition of bird species is the audio segmentation, which aims to select portions of audio that contain meaningful sound events and eliminates segments that contain predominantly background noise or sound events of other origin. Here we report on the development of an audio parameterization method with integrated robust frame selection that makes use of morphological filtering applied on the spectrogram seen as an image. The morphological filtering allows to exclude from further processing certain audio events, which otherwise could cause misclassification errors. The Mel Frequency Cepstral Coefficients (MFCCs) computed for the selected audio frames offer a good representation of the spectral information for dominant vocalizations because the morphological filtering eliminates short bursts of noise and suppresses weak competing signals. Experimental validation of the proposed method on the identification of 40 bird species from Brazil demonstrated superior accuracy and faster operation than three traditional and recent approaches. This is expressed as reduction of the relative error rate by 3.4% and the overall operational time by 7.5% when compared to the second best result. The improved frame selection robustness, precision, and operational speed facilitate applications like multi-species identification of real-field recordings.

• • by Allan Gonçalves de Oliveira and +2
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  • Machine Learning, Bird Identification, Computational Bioacoustics, Hidden Markov Model (HMM)

This paper treats all reports of Cave Swallow in North Carolina through 1995.

• • by Edward Brinkley
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  • Ornithology, Bird Identification, Field Ornithology

This paper treats observation of a Bulwer's Petrel in Chesapeake Bay 2 September 2006 following the passage of Tropical Storm Ernesto.

• • by Edward Brinkley
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  • Ornithology, Marine Ornithology, Seabirds, Conservation Biology and Ecology of Seabirds and Islands

This paper treats a shearwater of genus Puffinus initially identified as P. tenuirostris off the coast of Virginia 18 January 1998. In 2014, after more study of this species and congeners, the authors believe the record should be treated... more

This paper treats a shearwater of genus Puffinus initially identified as P. tenuirostris off the coast of Virginia 18 January 1998. In 2014, after more study of this species and congeners, the authors believe the record should be treated as P. griseus/tenuirostris.

• • by Edward Brinkley
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  • Ornithology, Marine Ornithology, Bird Identification, Ornithology and Marine Biology

(Note that an editorial error misidentifies the first illustration, which is of a bronzed grackle.) The status of the bronzed and purple grackles in New Jersey remains imperfectly known. What Frank Chapman suggested could provide... more

(Note that an editorial error misidentifies the first illustration, which is of a bronzed grackle.)
The status of the bronzed and purple grackles in New Jersey remains imperfectly known. What Frank Chapman suggested could provide "opportunity for the outdoor ornithologist" is still fodder for local birders, even those watching from their windows.

• • by Rick Wright
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  • Bird Identification, New Jersey, common grackle
• • by Edward Brinkley
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  • Marine Biology, Ornithology, Marine Ornithology, Cetaceans

The Cassiar junco, J. hyemalis cismontanus, remains poorly understood by birders. Juncos representing or visually resembling this taxon are significantly more frequent on the Great Plains than most observers recognize.

• • by Rick Wright
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  • Nebraska, Bird Identification, Sparrows
• • by James K Palmer
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  • Ornithology, Sound, Nature, Soundscape
• • by Ruvinda de Mel and +2
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  • Sri Lanka, Plumage Coloration, Bird Identification, Bird Diversity

This paper treats all twentieth-century records of Westland Petrel off South America.

• • by Edward Brinkley and +2
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  • Ornithology, Marine Ornithology, Seabirds, Conservation Biology and Ecology of Seabirds and Islands
• • by Juan Rafael Suárez Curtido
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  • Birds, Aves, Bird Identification
• • by Mads Bunch
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  • Ornithology, Passerines, Bird Identification

Houghton Mif in Harcourt, 2016 438 pages, softcover ABA Sales-Buteo Books 14668 W hen I moved from Europe to Guatemala some 20 years ago, it was Steve N. G. Howell and Sophie Webb's great guide to the birds of Mexico and northern Central... more

Houghton Mif in Harcourt, 2016 438 pages, softcover ABA Sales-Buteo Books 14668 W hen I moved from Europe to Guatemala some 20 years ago, it was Steve N. G. Howell and Sophie Webb's great guide to the birds of Mexico and northern Central America that opened the door to an entirely new avifauna. That book has remained essential for my studies of Guatemalan birds, for teaching local guides and research assistants, and for exedited by RICK WRIGHT and FRANK IZAGUIRRE •

• • by Knut Eisermann
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  • Central America, Bird Identification

The Crested Goshawk Accipiter trivirgatus has interested birdwatchers and ornithologists on Sri Lanka for many years as is evident by the detailed descriptions made by prominent ornithologists such as Vincent Legge and G. M. Henry. It is... more

The Crested Goshawk Accipiter trivirgatus has interested birdwatchers and ornithologists on Sri Lanka for many years as is evident by the detailed descriptions made by prominent ornithologists such as Vincent Legge and G. M. Henry. It is a medium sized accipiter widely distributed in the Indomalayan region, and 11 subspecies have been identified. The Sri Lankan subspecies layardi has been recorded island-wide and frequents forest habitats with dense tree cover. Although much has been written about its morphology and behaviour, the small differences in the plumage of the bird reported here have not been mentioned before and together with the accompanying images may be helpful in identifying juvenile Crested Goshawk on Sri Lanka.

• • by Amila Sumanapala
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  • Sri Lanka, Plumage Coloration, Bird Identification, Bird Diversity

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