To introduce my contribution this week I’ll post an audio challenge.
While leading my March Costa Rica tour this past week, I heard this unfamiliar vocalization which I recorded and tracked down. I was surprised when I saw the culprit. I have uploaded it as a mystery at Xeno-canto. Listen below and post your guesses in the comments section on this blog. It’s the very high repeated notes, not the Dusky Antbird in the background. It’s so high – the main part is between 11 and 12 kilohertz – that the sonogram automatically produced by the Xeno-Canto site cuts it off. It helps to have some German Shepherd in you ancestry to hear this, and most men over 55 will probably not have much luck in any event. Below the recording is an Audacity-generated sonogram that shows that there are actually five notes given in less than 1/2 second in each bout.
Besides mystery vocalizations, the Carara area is good for quite a few birds of open country and rain forest habitats. The trails pass by a couple different leks of the attractive Orange-collared Manakin.
We got lucky this year to be shown a pair of roosting Black-and-white Owls near the town of Tarcoles. For many years there was a pair easily seen in the central plaza of Orotina, but since the city trimmed the trees they haven’t been around.
Photo at top: White-whiskered Puffbird is a regular but easily missed denizen in the denser forest mid-story at Carara National Park.
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