Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird photographed in Waukesha County on September, 18 2013.

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Binomial name: Archilochus colubris

Category: Hummingbirds

What is Leucism? 

Leucism is an uncommon condition in birds.  This condition is caused by a genetic mutation which prevents pigments, particularly melanin, from being deposited evenly in the bird’s feathers.  Leucistic birds have melanin elsewhere in their bodies which is why they may have dark eyes, legs, and bills.  However, their true color will be missing or greatly reduced due to the lack of proper pigmentation.

What is Albinism?

Leucism is similar to albinism as in both cases the birds may be completely white.  However, albinism is defined as a complete absence of melanin in an animal.  Truly albino species will have pink eyes as the only color seen will be caused by blood vessels behind their eyes.  They will also have pink bills, legs, and feet.  Albinism is extremely rare in birds. 

Notes:

Leucistic birds are extremely uncommon for a number of reasons.  They are not thought to live very long because their white feathers make it difficult for them to hide from predators.  If they do stay alive, it is difficult for them to find a mate and successfully pass on their genetic mutation.  Additionally, the melanin found in regular birds adds strength to the feathers.  Leucistic birds lacking melanin have weaker feathers and thus have a more difficult time flying in severe weather.  Last, the reflective properties of white feathers may be problematic for birds who rely on solar energy for heat.

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

Leucistic Ruby-throated Hummingbird

To see Ruby-throated Hummingbirds without Leucism, please visit my posts featuring this bird on Red Bee Balm, Royal Catchfly and Cardinal Flower.

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About admin

Window to Wildlife features the photography of Jim Edlhuber. A lifelong native of Wisconsin, Jim has been photographing wildlife for 20 years. He considers himself an avid photographer and is always trying to capture nature and wildlife through his lens. He is in several photography clubs and has won numerous awards for his work. In recent years, Jim has focused mostly on birding photography and finds it to be the most challenging.

3 Responses to Leucistic Ruby-throated Hummingbird

  1. Nancy Nabak says:

    You are an absolute rock star with the camera, Jim! These are amaze-fest!

  2. Patrick Dean says:

    AAA! Awesome As Always!

  3. Elaine Swanson says:

    Delicate, graceful – looking like a creature of the moonlight – thanks again, Jim!

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