Ornithological notes

By Peter Boesman
2 days 7 hours ago

In the following text, I briefly analyze and compare the voice of the different races of Mottled Owl (Ciccaba virgata). I also try to quantify the extent of any vocal...

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By Peter Boesman
2 weeks 1 day ago

In the following we briefly analyze and compare voice of the different races of Least Nighthawk (Chordeiles pusillus). We also try to quantify the extent of any vocal...

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By Bent Rønsholdt
2 months 3 days ago

While birding on Serangan (Turtle Island), Bali, on 26th February 2016, I observed a flock of six to ten Red-cheeked Starlings (Agropsar philippensis). The weather was overcast, providing...

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By Peter Boesman
2 months 1 week ago

In the following we briefly analyze and compare voice of the different races of Plumbeous Pigeon (Patagioenas plumbea). We also try to quantify the extent of any vocal...

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By Ignasi Oliveras
4 months 1 week ago

I observed two adult Speckle-fronted Weavers (Sporopipes frontalis), perhaps a pair, near Tami, Savanes, northern Togo, on six different days between 29 September and 9 October 2016....

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By Peter Boesman
4 months 3 weeks ago

In the following we briefly analyze and compare voice of the two races of Dusky Bush-tanager (Chlorospingus semifuscus). We also try to quantify the extent of any vocal...

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By Peter Boesman
4 months 3 weeks ago

In the following we briefly analyze and compare voice of the three races of Saffron-billed Sparrow (Arremon flavirostris). We also try to quantify the extent of any vocal...

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By Peter Boesman
4 months 3 weeks ago

In the following we briefly analyze and compare voice of Western Hemispingus (Hemispingus ochraceus), Black-eared Hemispingus (H. melanotis) and Piura Hemispingus (H....

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By Peter Boesman
4 months 3 weeks ago

In the following we briefly analyze and compare voice of White-browed Hemispingus (Hemispingus auricularis) with Black-capped Hemispingus (H. atropileus). We also try...

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By Peter Boesman
4 months 3 weeks ago

In the following we briefly analyze and compare voice of Lemon-rumped Tanager (Ramphocelus icteronotus) with Flame-rumped Tanager (R. flammigerus). We also try to...

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