1 (To the chief Musician, A Psalm of David.) O LORD, thou hast searched me, and known me.
2 Thou knowest my downsitting and mine uprising, thou understandest my thought afar off.
A delightfully funny search.
why do birds have mustaches?
Birds do not have moustaches, because they do not have facial hair. They have what birders call “field markings” used in the identification of birds and some of these field markings do indeed resemble moustaches. That specific marking, depending on the bird, can be called, “malar”, “moustachial stripe”, or “sub-moustachial stripe”.
These field markings also have use for the birds themselves. The bright markings of a bird, such as on this male Horned Lark, are used to attract females. In some species, the brighter males are more appealing to the females, no matter how glorious their song is. There are other things females look for in a mate, but this goes beyond the scope of the post.
But the markings of birds also can mean life or death for them. Their colours act as camouflage to hide from predators. If there was no snow on the ground, this Horned Lark would appear to melt into his surroundings. I have seen this. On my walks near home, I hear the Horned Larks. I see one pop up and give an alarm call. I know right where they are, but even with my camera or binocs, I cannot see a one. After some time, they grow annoyed with me and the flock bursts into flight toward parts unknown.