Monthly Archives: September 2015

Destinations – Detroit River Hawk Watch

The Detroit River Hawk Watch (a joint venture of the Detroit River International Wildlife Refuge and its Friends group, the International Wildlife Refuge Alliance) is the Boat Launch at Lake Erie Metropark located approximately 20 miles south of Detroit, Michigan. The location is at the mouth of the Detroit River as it enters Lake Erie. Continue reading

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September 2015 Monthly Census at Ottawa NWR

Here is documentation of the fall migration as of September 6 at the Ottawa National Wildlife Refuge on Lake Erie. Thanks to Douglas Vogus., who published the monthly census on the OHIO-BIRDS email list. I publish it here so I can marvel at the detail, especially the butterfly count! Continue reading

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Birding Then and Now – Red Knot

Yesterday was International Vulture Awareness Day. Today is World Shorebirds Day. It’s hard to keep up with all the conservation events out there, but I like the idea that the Red Knot has been selected to be the 2015 “Shorebird of the Year” – as hokey as that sounds. I saw Red Knots once as a kid, circa 1969, either at Cape May or Cape Cod. I wish eBird had been around 50 years ago so I could retrieve details from it to refresh my memory! Several migrating Red Knots have been reported in northern Ohio since mid-August. So they do pass through my current whereabouts Continue reading

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Today is International Vulture Awareness Day

The first Saturday in September each year is International Vulture Awareness Day. | Vultures are an ecologically vital group of birds that face a range of threats in many areas that they occur. Populations of many species are under pressure and some species are facing extinction. Continue reading

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3.04 Trillion Trees Are Not Enough

[Crowther et al 2015] Anstract: The global extent and distribution of forest trees is central to our understanding of the terrestrial biosphere. We provide the first spatially continuous map of forest tree density at a global scale. This map reveals that the global number of trees is approximately 3.04 trillion, an order of magnitude higher than the previous estimate. Of these trees, approximately 1.39 trillion exist in tropical and subtropical forests, with 0.74 trillion in boreal regions and 0.61 trillion in temperate regions. Biome-level trends in tree density demonstrate the importance of climate and topography in controlling local tree densities at finer scales, as well as the overwhelming effect of humans across most of the world. Based on our projected tree densities, we estimate that over 15 billion trees are cut down each year, and the global number of trees has fallen by approximately 46% since the start of human civilization. [Nature (2015) doi:10.1038/nature14967] Continue reading

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