> Your understanding is correct, but I don't think your conclusion is. If a
> bird wants to be at a specific temperature, it will have to migrate.
Indeed so, and the same applies if a migrant wants to chase different food sources (or one damnably motile one), which IIRC is the source of many of the rather extravagant whale migrations. John's reasoning only rules out "hemisphere to hemisphere" migrations, which are rather extreme, even by earth standards. (Especially those pole-to-pole nutters.)
> That said, I think the ocean is a pretty big migration. I'd be surprised if
> anything crosses the "equator."
Where's that, then?
I think it's not unlikely that a Genertelan bird could manage as far as the extreme south of the East Isles, if they can get across the neck of the Sea of Fog; Pamaltelan birds may be able to go as far north as Teleos, if they can manage a hop of similar length. (Which is actually further north than the former, not that that helps much.) Making the trans-continental round trip would require a single hop of about 1500km, which is a little stiff (not sure if there's a terrestrial bird that can manage this (this is what we pay Trotsky so lavishly for, isn't it?), though there's a hummingbird (fercrisakes) that flies across the Gulf of Mexico in one go, when the idiot avian could just go round...); or rather more simply, by being a seabird (or other sea creature). Not that I have any objection to some sort of ueber-albatross that flies all 4000km in one go, just for the heck of it, mind you.
Oh, and have a very happy new year, everyone! (_This_ year, in Glorantha?)
Slainte!
Alex.
End of The Glorantha Digest V6 #381
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