Friday, June 1, 2012

Gruiformes is the order of birds that houses the rails, coots, limpkin and cranes.  In fact, the very name of the order means "crane-like".  Gruiformes is comprised of three families, nine genera, and twelve species in Eastern North America. Gruiformes prefer marshy wetlands for habitat.

  • Rails are shy, secretive birds in the family Rallidae which prefer running and swimming to flying.  Some have long beaks for foraging in shallow water, but some have shorter beaks which can be used for the same purpose.  Representative species include the Virginia Rail, Black Rail, and Sora.  
  • The Purple Gallinule, Common Moorhen, and American Coot are in the Rail family but resemble ducks more than other rails, and like ducks, can often be found floating on ponds.  The Moorhen is an avid swimmer, the Coot dives for aquatic plants, and the Gallinule rarely swims at all.  
  • The Limpkin is the only extant species in the family Aramidae, is most closely related to the cranes, and has a small range in North America, more or less confined to Florida.  It searches the edges of ponds and streams looking for mollusks.  It has a wild, almost frightening call.  
  • Cranes, of the order Gruidae, are easily the largest and most gregarious birds in the order, often found in flocks, and known for epic migrations.  They have cacophonous mating and courtship displays, which involve jumping and dancing as well.  The two American species are the Sandhill Crane and the endangered Whooping Crane, with less than 600 individuals in the wild.


The secretive Black Rail


The King Rail after a successful bout of crustacean-hunting



The unmistakeable Purple Gallinule, superficially resembling a pied duck more than its Rail cousins


The Limpkin, whose eerie call haunts the Florida marshes which it inhabits


The endangered Whooping Crane in flight with unmistakeable black wingtips on gorgeous white wings







9 comments:

  1. Steve, the blog looks great! You were the first one to complete the assignent, and I've already posted a link to your blog on the eCollege site for everyone to see. This is exactly what I had in mind for this week's assignment...nice job.

    Dr. V

    ReplyDelete
  2. Hey Steve, I see that you mentioned that the Limpkin has an eerie frightening call. Do you think that is just its way of communicating to its mates, or is it a way of scaring off predators?

    ReplyDelete
    Replies
    1. Hey! I think the call is probably related to mates or territory. I know some animals, like coyotes, will make noise to scare prey out of their hiding spaces, but I think animals that use sound to scare predators are somewhat rare in the animal kingdom. However, I am not exactly sure.

      Delete
    2. This comment has been removed by a blog administrator.

      Delete
  3. According to the Peterson guide it says that the Whooping crane is an endangered species but increasing. Would you know why it is on the endangered species list?

    ReplyDelete
    Replies
    1. Andres, the Whooping Crane had a relatively low population to begin with, and, like everything else, has had its population decimated by a combination of over-hunting and habitat loss. Just another of the many pernicious effects of European colonization of this once-pristine land.

      Delete
  4. Though there order means crane-like they don't all look like a typical crane especially the black rail. I wonder how did they classified the rail under this order.

    ReplyDelete
    Replies
    1. Faiq, great question. Check out the morphology post for the answer!

      Delete