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Re: Moa-Tinamou Clade Found Within Ratites
Rails are probably the best example - seemingly weak flyers that have
nonetheless established themselves widely on oceanic islands and have evolved
flightlessness multiple times (even on islands with mammalian predators, such
as Tasmania and New Guinea).
1825 Shady Creek Court
Mississauga, ON L5L 3W2
From: Dann Pigdon <firstname.lastname@example.org>
Sent: Thursday, May 29, 2014 6:52:06 PM
Subject: Re: Moa-Tinamou Clade Found Within Ratites
On Thu, May 29th, 2014 at 5:16 PM, Tim Williams <email@example.com> wrote:
> This requires not just the ability to fly; it also requires flight
> abilities good enough for long-distance overwater dispersal. This
> includes the ancestors of kiwi and elephant birds.
Puffins aren't exactly peregrine falcons when it comes to flight ability, but
they manage to migrate
long distances regardless. Of course they have to beat those short wings very
fast to do so. It
would seem that long-distance overwater dispersal doesn't require much finesse.
Birds that are only just capable of managing such a feat are probably the most
likely to become
flightless. Especially if continental drift eventually widens the sea gaps
beyond what they're capable
of crossing, making migration elsewhere impossible.
Spatial Data Analyst Australian Dinosaurs
Melbourne, Australia http://home.alphalink.com.au/~dannj