Archive for October, 2009

Red-breasted Nuthatch

Saturday, October 24th, 2009

Red-breasted Nuthatch (Sitta canadensis) song, September 5, 2009, Emma Carlin Trail, South Kettle Morraine, Waukesha, WI.

Red-breasted Nuthatch song

Red-breasted Nuthatch song

This appears to be the “agonistic song” as described in Birds of North America Online (great blog on bird sounds) has a very informative article about nasality in bird sounds that uses the Red-breasted Nuthatch song as the classic example.

Yellow-rumped Warbler (Dendroica coronata)

Wednesday, October 21st, 2009

Yellow-rumped Warbler (Dendroica coronata) “chek” call, October 18, 2009, Cedarburg Bog, Ozaukee County, WI.

Yellow-rumped Warbler

A beautiful, sunny fall morning (despite the hunters blasting away all around and giving me a general feeling of unease.)
You can hear the leaves falling in the background of this recording.

Northern Flicker (Colaptes auratus)

Sunday, October 11th, 2009

Northern Flicker (Colaptes auratus) “klee-yer” calls, October 11, 2009, Kettle Moraine State Forest—Southern Unit, Headquarters, Waukesha County, WI.

Northern Flicker

This flicker flew into a tree in front of a flock of robins that I was recording. You can hear various robin vocalizations in the background as the flicker called twice. Its evident from the two sonograms that the calls are highly variable. This call is often referred to as the “klee-yer” or “Peah” call. There is some disagreement in the literature as to its function, either as an alarm call or a contact call. BNA cites research suggesting that:

Peah functions as a “signature” call that enables adults and fledglings to recognize each other. Duncan (1990) showed that Peahs contain sufficient information for individual identification and argued that parents learn signatures of their young and vice versa during late hatchling phase, and this information is used to locate each other postfledging.

Acadian Flycatcher (Empidonax virescens)

Wednesday, October 7th, 2009

Acadian Flycatcher song, September 5, 2009, Emma Carlin Trail, South Kettle Morraine, Waukesha, WI.

Acadian Flycatcher

Acadian Flycatcher