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The spur-winged goose (Plectropterus gambensis) is a large waterfowl which is quite common in wetlands throughout sub-Saharan Africa.  Adults are 75–115 cm (30–45 in) long and weigh up to 7 kg (15 pounds).  The bird is a close relative of both true geese and shelducks (although they aren’t really geese or ducks but have their own genus).  They are intelligent gregarious birds which live in flocks of around 50.  They look somewhat plain—their feathers are dun, sable, and white, and their faces and beaks are red–like geese badly made up to look like vultures. Yet spur-winged geese are amazing animals in several respects (I mean beyond just being geese–which live for decades, have complicated social lives, and can fly across whole continents).

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Spur-winged geese have a habit of eating blister beetles and storing the poisonous cantharidin from the insects within their bodies.  Cantharidin has a long strange history in human society which you can look up on your own (it was known as “Spanish Fly”), however it is principally notable for being poisonous: 10 mg of cantharidin is enough to kill an adult human!  Spur-winged geese–particularly those which live in and around the Gambiaare often poisonous–or at least they have flesh which is toxic to humans.

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Additionally, males have dinosaur-like spurs on their wings which they use, dinosaur-like, to fight each other for females.  These wing-spurs are not trivial.  Poultry keepers who have tried to keep the spur-winged goose with other birds have suffered losses to the fearsome sharpened wrist-spurs (and the aggressive territoriality of the spur-winged males).

Probably the most remarkable thing about the spur-winged goose though is its speed.  These birds are blazing fast.   They appear on shortlists with crazy birds like peregrine falcons, gyrfalcons, swifts, and frigatebirds.  Although they cannot dive at speeds approaching the raptors or maneuver like the swifts,  spur-winged geese can really move quickly.  When the goose gets up to speed, it can travel 142 kilometers per hour (88 miles per hour).  It is as fast as the Delorean in Back to the Future (though it apparently lacks time-traveling abilities).

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So, to sum up the spur-winged goose: it is an omnivore which lives throughout the most competitive ecosystems of Africa. It has fighting spurs on its wings, can fly as fast as a World War I warplane, and is toxic. I guess I am saying that you need to respect the spur-winged goose!

The Paradise Tree Snake (Chrysopelea ornata)

The paradise tree snake (Chrysopelea paradise) is a very beautiful tree snake which lives in Southeast Asia.  It ranges from the Philippines and Indonesia, up through Malaysia, Myanmar and into India.  The snake particularly enjoys climbing into the crowns of coconut palms where it feeds on arborial lizards (which it immobilizes with extremely weak venom).  The snake lives in a variety of habitats including mangrove swamps, rainforests, tree plantations, gardens, and parks.  It stands out because of its attractive pattern of yellow on black (sometimes tinted with red).

Paradise Tree Snake Flying!

What really sets the paradise tree snake apart from other pretty tropical snakes however is its impressive ability to fly—or at least to glide.  The snake holds onto its launching platform with the end of its tail and dangles the majority of its body into a j-shape.  The daring reptile then swings back and forth and launches itself through the air!  The snake sucks in its stomach and flares out its ribs so as to take the shape of a flying wing and then it slithers through the air making lateral motions with its body in order to cause air pressure underneath it to push its body up.   Smaller snakes (which are better gliders) can glide up to 100 meters (over 300 feet) and are reckoned by biomechanical locomotion specialists to be finer gliders than colugos and gliding squirrels.

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