In a pennaceous feather, the barbs grow helically around the tubular feather germ and fuse on one side to form the rachis.Simultaneously, new barb ridges form on the other side of the tube.
In both types of feather, the barbules that extend from the barb ramus grow from a single layer of cells, called the barbule plate, on the periphery of the barb ridge.
The lively and recognizable Tiger barb should never be kept with long-finned species, such as angelfish, gouramis, or Veiltail hybrids as they like to nibble at their fins!
PRESIDENT TRUMP DELIVERED A fairly traditional mix of barbs and bromides during his 80-minute State of the Union address on Jan. 30, but one seemingly anodyne claim was actually pretty audacious.
The sharp metal barbs tore the skin of the men who stretched it along fence tops. But they prevented cattle from pushing over the fences and destroying crops.
The excitement of the party banished, for the most part, the memory of Rhett's barbs and she was happy, happier than she had been in years as she planned her reception.
In a ship I belonged to, a small cub Sperm Whale was once bodily hoisted to the deck for his poke or bag, to make sheaths for the barbs of the harpoons, and for the heads of the lances.
Today, the typical feather consists of a central shaft, called a rachis, with serial paired barbs forming a flat, curved surface, which is called a vane.
Bird feathers have highly water-resistant parts called the pennaceous barb, which stops the water from actually going in and soaking the rest of the bird.
So, the owl feathers, the ends of the barbs have combs or little brushes that basically break up the air in a way that it doesn't produce a sound when it's flying.