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Grallards: New Zealand’s Next Extinction or Newest Species?

10,000 Birds

The obvious choice was the Mallard , that plucky familiar northern hemisphere species that is the father of the even more familiar domesticated duck. In fact, as the species was quickly identified as as creating hybrids with Grey Ducks, the opinion was by the 1920s that the species shouldn’t be released further.

Species 165
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The Eurasian Collared-Dove Explosion: Coming to a Town Near You!

10,000 Birds

The northwestern spread of this non-native species made it to my yard a few years ago. The lightest shade of lavender coincides with a 0 – 2% frequency of sightings, the next darker shade 2 – 10%, the next 10 – 25%, the next 25 – 40% and the darkest (almost black) shade is a 40 – 100% occurrence of the species.

Breeders 177
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Birding Chongming Island in summer

10,000 Birds

This would have allowed you to summarize your experience in sentences such as “A total of 98 boluses regurgitated by 52 chicks aged 1 day to 11 days after hatching form the sample and are shown to contain 323 food items.” Women who like jacanas will probably also like Spotted Redshanks. But maybe that is actually a good thing.

Birds 162
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Noxious: Montana’s Battle With Spotted Knapweed, and What Birders Can Do

10,000 Birds

It’s bad enough to be an invasive species — the term shows a major fall in public esteem from the days when acclimatization was the rage. But as a descriptor, ‘invasive species’ doesn’t have a patch on ‘noxious weed’ Call something a noxious weed and there’s no doubt where you stand on it.

Montana 164
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African Pythons Targeted for Removal

10,000 Birds

Another species of Python, the African Python ( Python sebae ) has established a small population in the 2,877-acre Bird Drive Area (BDA) in South Florida. Photo Credit: Invasive and Exotic Species of North America (www.invasive.org). The invasive Burmese Python ( Python molurus ) is well established in the Florida Everglade.

Pythons 179
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Feral Cats Are An Invasive Species in North America (and elsewhere)

10,000 Birds

Read what you want about the origin of domestic cats; the genetic evidence is not properly sampled. Also, feral Cats on islands seem to be a serious problem, causing the extirpation of some indigenous species. They are invasive species. Just as importantly, or more importantly, feral Cats have the invasive species advantage.

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Phillipps’ Field Guide to the Birds of Borneo: A Book Review

10,000 Birds

Did I dare dip my toe into this catalog of tantalizing species? Phillipps’ Field Guide (I’ll be using this shortened form of the title) covers 673 avian species, including 59 endemics, and 53 species that have not been documented yet for the area but which may show up in the next few years. Now, I’m not so sure.

Brunei 173