Ornithological notes

By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the two races of White-throated Greenbul (Phyllastrephus albigularis). We also try to quantify the extent of any vocal...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the different races of Opal-rumped Tanager (Tangara velia). We also try to quantify the extent of any vocal differences...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of Blue-winged Mountain-tanager (Anisognathus somptuosus) and Bolivian Mountain-tanager (Anisognathus flavinucha)....

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the different races of Scarlet-bellied Mountain-tanager (Anisognathus igniventris). We also try to quantify the extent...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the three races of Buff-breasted Mountain-tanager (Dubusia taeniata). We also try to quantify the extent of any vocal...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the different races of Blue-and-yellow Tanager (Thraupis bonariensis). We also try to quantify the extent of any vocal...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the different races of Dull-colored Grassquit (Tiaris obscurus). We also try to quantify the extent of any vocal...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the different races of Band-tailed Sierra-finch (Phrygilus alaudinus). We also try to quantify the extent of any vocal...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the two races of Ringed Warbling-finch (Poospiza torquata). We also try to quantify the extent of any vocal differences...

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By Peter Boesman
2 years 4 months ago

In the following we briefly analyze and compare voice of the different races of Black-eared Hemispingus (Hemispingus melanotis). We also try to quantify the extent of any vocal...

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