That seems to make sense. I wondered if it might relate to breathing residue in cold air but with the close up it seems to have a very distinct structure. Never seen it before.
So, overall it seems your islands have fewer predators than some places.
It's very strange but at my acreage home I have virtually no House sparrows while only a few miles away in Edmonton there are tons of them - I'm happy with that!
Jack
[/quote]
On the first one - I'm 99.9% sure it's a keratin slice. The outer layer of the bird's bill is keratin (kind of protein BTW!).
On the second one - here, on the land you are pretty much safe (well, there are some people around

). No snakes (only one tiny, blind and harmless species), no big animals except some (quit a bit

) feral pigs but it's the Asian variety, they are far from the size and the attitude of the European bores... Some toxic spiders (incl. 3 species of Widows) and centipedes (~3-4 species) but they are not real danger, especially the widows - you have to search them to see one (not high probability even than). In the ocean it is very different story off course!
On the third one: it means your house is deeper in the nature.
Lucky you!!!