Warbler and sparrow nocturnal flight call composition |  Eastern North America Transect

American Redstart   Black-and-white Warbler   Black-throated Blue Warbler   Canada Warbler   Cape May Warbler   Chestnut-sided Warbler   Chipping Sparrow   Common Yellowthroat   Hooded Warbler   Mourning Warbler   Northern Waterthrush   Ovenbird   Northern Parula   Savannah Sparrow   Wilson's Warbler   "Zeep" complex"   "Double up" complex

 14-21 September 2013

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Comparison with same week in 2012