Because Barbelith is down, I wasn't able to post this where I wanted to.

So I'm putting it here. Someone there had a significant dream about a god who ate seagulls, and who seemed to be indicating this was a preferred sacrifice.

Among a few vague stabs in the direction of Njord, the Norse sea god, and harbingers of the Siberian/Northern Pacific shamanic spirit Big-Raven, I came across the following correspondences:

I just found this and this -- they're both on JSTOR, so you *may* need to be on a university computer to read them.

The first is an article on the Odyssey mentioning
gulls as associated with Calypso and being
"chthonic birds," thus giving away her identity as
someone not-so-nice. The second is another thing on
Siberian shamanism, but specifically about
menelak or "Arctic hysteria," which is a kind of
hereditary, possibly neurotic epilepsy. The
footnotes are fun throughout.

There's also this thing on symbols of
Athena, which, like prior citations, reinforces the
identification of seagulls with owls and ravens.
(All three are closely associated with Athena,
especially her oracular aspect, or her function as
"Mistress of the Dead." They're death birds.)

Let me see if I can transcribe the nut graf(s) here:

Although Athena is incarnate in a number of
birds in Homer, most notably the vulture, her cult
later recognized only the owl, the crow, and one
other bird we have not yet mentioned, the
sea-crow (enalios korone) or seagull
(aithuia). Athena Aithyia enjoyed a cult on a high
cliff of the coast near Megara, at the same spot
where the hero Pandion was said to be buried. The
last may be of some significance, for in ancient as
in modern times in Greece the gull was looked
upon as an embodiment of the soul of the dead,
particularly those dead who had drowned at sea. It was
acquainted with the secrets of the sea,
accordingly, and was also a weather-bird, revealing the
approach of rain or a storm. The name Aithyia
appears to mean "The Burning" or "The Bright."

To summarize the results of our survey,
then, Athena's incarnation in (or, at the least,
accompaniment by) the birds we have described - owl,
crow, gull - displays once again her character as
Mistress of the Dead, for all three are death
birds and birds of prey. The gull, and probably the
owl, is a dead man come back to life; the owl
particularly portends death and doom; the
crow-goddess is associated with Persephone. With respect to
the last, too, we may point out that in the
Germanic north the crow (as well as the vulture) was
the bird of the dead and was called literally the
"Corpse-Chooser," being also the official
representative of the Valkyries, the Germanic demons of
war and death, especially in battle. (Note:
demons??) We may pause to observe,
incidentally, that the Valkyries were also well known as
spinners; the web they weave is known as the web of
victory, and it is made of human bodies.
(Note: this ties in with a much longer discussion of
spinning, Arachne, hanging and the Fates earlier
in the article.)

It goes on from there about carrion birds and
Athena-as-war-goddess. Then...

Athena's ornithic relationshps also confirm
what we have already suggested about her originally
oracular quality, for all three birds were
rumored to be prophetic. We have seen that the crow and
the gull were both harbingers of rain in
particular. Finally, images of light and heat were seen
to characterize all three birds: the glaux
and aithuia are both literally "The
Bright.... which the author links to some
supposition about a lunar aspect of Athena. Which seems a
little weird to me, but he goes on about
crescents on coins with owls and olive branches (symbols
of Athena) and potential for Athena to be "dew
bringer" -- life-giving moisture.

That's from Symbolic Elements in the Cult of
Athena, by Robert Luyster, History of Religions ©
1965

Sea-crows? Brother of owls? Interesting.