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Re: bauplan convergence

How many waterbirds with wing-flippers have lost flight and then been
able to regain it?

None, to my knowledge; in fact secondary flightlessness seems always to have been a one-way street, though of course that may be an artifact of our data set, which consists mostly of living or recently extinct examples.
Ronald I. Orenstein Phone: (905) 820-7886
International Wildlife Coalition Fax/Modem: (905) 569-0116
1825 Shady Creek Court
Mississauga, Ontario, Canada L5L 3W2 mailto:ornstn@home.com