I was thinking about sets of sets when I came across this set of similar wrens, discussing the collections of identifying marks that make up a distinguishable bird species.
The same site has a lovely little discussion of preparing the mind to see birds.
Experts say that when we lose something, before we begin our search to find the lost thing we should picture the object in our minds. This kind of “visualization” causes the brain to do something wonderful. On the one hand, it appears to filter out many unnecessary sightings but, on the other, if something even remotely resembling the lost object comes into view, the mind seems to “jump” at it.
Power of pattern matching.
I ran into this while I was looking for info about whether found feathers can have any germs or mites or whatever (probably not). I love the wealth of g-rated porn that has blossomed under YouTube’s anti-nudity terms of service. I don’t think they intended to create a video sharing service where only kinky sexplay is allowed (watching women fart, smelling socks…), but I guess that’s a fairly predictable side-effect of banning mainstream, tab-a-slot-b, show-the-boobs sex in an online space.
So far I haven’t found anything especially subversive— lots of groomed women and muscular men, lots of hypergender, whatever— but I actually like this tickling video because the tickler and the ticklee seem to have actual communication with each other. “OK, OK,” feet flex, feet relax. That’s kind of magic to see on YouTube.