Albino Birds

Home / Uncategorized / Albino Birds

Albino Birds

viagra prostate pain
viagra 100mg cost
Probably I’m going to bookmark your blog
viagra products manufacturers
viagra 100mg costo
viagra vision problems
viagra after propecia
viagra profits 2010
That pregnancy also ended in m/c plus the fetus never properly grew
generic viagra problems
viagra 100mg price
Brentclosed at $108.82 abarrel on Thursday.
viagra prostate surgery
pfizer viagra promotion
"I don't feel guilty at all about having doped," Landis told ESPN.com
acheter du viagra
viagra prostate problems
viagra profits 2012
Natually I’ll deliver link inside your online weblog
viagra similar products
viagra y propecia
These sprays are stated to not be effective, as growth hormone is a big and unstable molecule which can not go through membranes within the mouth
sildenafil 100mg viagra
Viruses are the best known agents of infections, but other types of organisms also exist that may be linked to infections of various parts of the body
viagra 100mg prezzo
pris viagra thailand
viagra eye problems
viagra generic drugs
We have done repeated studies and confirmed the powerful libido promoting properties
viagra promotional items
Green fields, flowers, pretty little cottages .
viagra prostatectomy recovery
viagra nedouc inky
Nowadays bloggers publish just about gossip and internet stuff and this is really frustrating
viagra vedlejsi ucinky
The clinical [url=http://buyaugmentin.ru/]augmentin online[/url] value of these findings throughout lasting use of desloratadine is not understood
viagra problems ejaculation
viagra vision changes
viagra prostate cancer
He said counselors can help people develop individualized methods for avoiding and managing stress
viagra propecia interaction
We always take half a 250 mg pill, beginning 24 hours before the trip andI always stop taking them the same morning of our summit attack
viagra promotional codes
viagra generic drug
The state of Maine has already passed a similar law in October 2013, helping thousands of their constituents to feel comfortable about buying online and saving money on their prescription medications
buy viagra ireland
Theyre.So that he fired this post has been ready, taking hold on her 13 year.I pulled my panties with a sigh
viagra pill splitting
viagra professional online
viagra kamagra 100mg
viagra products suppliers
viagra splitting tablets
"Weighing the highly important right to communicate
viagra profits 2011
In addition, it must be large enough to match above your current base and additionally protective cellular levels
alternative viagra products
viagra breathing problems
E has never had a champion to sing its praises the way Linus Pauling, the two-time Nobel laureate, ballyhooed Vitamin C
viagra alternative natural
viagra professional wikipedia
No conduza, utilize mquinas, ou faa qualquer coisa que precise de ateno mental até que saiba como este medicamento o afecta
viagra et propecia
Please check out my web site as well and let me know how you feel.
viagra heart problems
Fear and disgust were the only outcomes.
viagra sleep problems
viagra propecia together
viagra 100mg online
I have a question when it comes to reflux and sleepy babies
viagra professional 100mg
Viime kaudellakin hnelle niin vaikealla autolla hn kellotti yhden nopeimman kisakierroksen Monacosta.
viagra vs.generic sildenafil
Narcotic pain medications are seldom suggested for use in fibromyalgia due to their high addiction potential
quando prendere viagra

494979057_0be416c08eAlbino birds are not particularly unusual. I�ve seen white robins, jays, crows, peacocks, and others. And of course there are white domestic chickens, ducks, geese, and turkeys. The whole explanation of feather color is fairly complex, but let�s just discuss pigments for the time being. These pigments fall into three main groups �yellow, red, and black/brown colors. The pigments are deposited into the feathers as they grow and the combination of pigments and feather structure form the colors and patterns of the birds� feathers. (There are no blue pigments in birds; blue birds are actually brown-pigmented, the feather structure producing the blue color.) Since most birds have a summer and winter plumage, there may be two or more plumage patterns in one species every year and the proportions of pigments change. Ptarmigans, chicken-like birds of the far north and tundra, molt to an all-white plumage in the winter for camouflage.

With such a demanding physiological process, it is no wonder that occasionally things go awry. Sometimes there is a total lack of pigments and the result is a totally white bird with a red eye � a true albino. Some birds are totally white but have colored eyes (the iris) and are not true albinos. Just a short time ago a friend sent me a photo of an albino hummingbird.

Occasionally there is a dilution of the pigments which produces a faded version of the bird. I had a gray and white Yellow-billed Magpie visiting my backyard with a flock of normal colored black and white magpies. This is called incomplete albinism. There are a number of birds that have light and dark phases, where incomplete albinism has become a permanent condition in the species. And then there are just plain dilutions of dark feathers.The Red-tailed Hawk shows a gradation of feather darkness from very dark to very light. Populations of the Fox Sparrow on the Pacific coast are darker in the southern part of their range and lighter as one goes northward.

There is also partial albinism in which the bird shows patches of white or individual white feathers among its normal plumage. This is very common in House Sparrows for some reason, but can be seen in many other birds, especially the soaring hawks.

Ever notice that many birds that are almost all white have black wing tips � their primary flight feathers? This is typical for gulls, terns, Snow Geese, Wood Stork, White Pelican, and others. The reason is that the black pigment (melanin granules) strengthens the feathers which are most subject to wear and tear. Herons and white swans are the only exceptions as they have other adaptations in their primary feathers to avoid excessive wear.

So what happens to the hapless white robin or jay in its habitat surrounded by normal colored birds? If not eaten by a predator because it stands out, it is rejected by any potential mates. White may imply clean and pristine in the human world, but the meaning is very different among birds.

Dr. Roger Lederer
Dr. Roger Lederer
Ornithologist and emeritus Professor of Biological Sciences at California State University, Chico, whose academic and research interests are ecology, environmental science, science education and ornithology. Published over thirty scientific research papers, a textbook entitled Ecology and Field Biology, books entitled Amazing Birds, Birds of New England, Pacific Coast Bird Finder, Bird Finder, Birds of Bidwell Park, and Latin for Birdwatchers . Dr. Lederer has taught ornithology and ecology, worked with environmental organizations and schools on research and education projects, has traveled to over 100 countries, given many public presentations, and knows exactly what birds you will find anywhere in the world.
Recent Posts

Leave a Comment

Contact Us

We'll answer your questions
about WILD birds.

Not readable? Change text. captcha txt

Start typing and press Enter to search

Ivory-billed_Woodpecker_by_Jerry_A._Payne /a!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/ Page Caching using disk: enhanced Database Caching 2/199 queries in 0.060 seconds using disk Object Caching 4239/4744 objects using disk Served from: ornithology.com @ 2016-03-08 07:38:28 by W3 Total Cache --