Long time readers of VP know that I enjoy birds. It's something of a hobby of mine, and the spring migration is a great time to get out and try to get a good look at some of the beautiful bits of feathered fluff passing through on their northward trek.
Here are a few of my favorites from this past week. All of these pics are of males of the species. Females are often more drab, and, in the case of the last two species, they look much different than the males:
The bird above is a Magnolia warbler. It's the bird that inspired a young teen-ager named Roger Tory Peterson to take up birding which led to a lifetime of painting birds and a whole series of nature field guides. Peterson saw the Magnolia warbler in New York's Central park and was immediately hooked on birds.
The Blackburnian warbler is in my mind one of the most striking birds in all of North America. When the sunlight hits the bird's throat it's as if it has been set aflame.
The Cape May warbler nests in boreal forests in the U.S. and Canada and is only found in Cape May, NJ during migration. It was first described by ornithologist Alexander Wilson in Cape May, NJ but not seen there for a hundred years afterward. The Cape May warbler's tongue is unique among warblers. It's tubular, like the hummingbird's tongue, and enables the bird to sip nectar from flowers on its wintering grounds in the Caribbean.
The Prothonotary warbler is famous, those who've read about the "Red Scare" of the early 1950s might recall, for being instrumental in convicting Alger Hiss on charges of spying for the Soviet Union. You can read about it
here. The Prothonotary warbler got its name from the bright yellow robes worn by papal clerks, known as prothonotaries, in the Roman Catholic church.
The bird pictured above is an Indigo bunting. Here's an interesting fact about birds that many people have a hard time believing. Birds do not have blue pigment in their feathers. The blue color found in many birds is due to the way their feathers refract sunlight. The Indigo bunting is common in eastern North America but is often overlooked because it's small, and the dazzling blue color only shows up in good light against a proper background.
The Rose-breasted grosbeak is a handsome woodland species that occasionally visits sunflower feeders during migration. The female looks like a large brown sparrow.
Bird migration is one of the most astonishing phenomena in nature and it's occurring this week across much of the United States. Since it happens largely after dark most people aren't very much aware of the amazing spectacle that's occurring in the skies above them most nights at this time of year.
Even so, millions of birds are traveling each night from their winter haunts in Central and South America to their breeding territories in North America. The migration involves birds of all types, hundreds of different species, navigating their way north to find a mate, establish a territory, breed and return south again in the Fall.
To help give a sense of the movements of birds during migration, the Cornell Laboratory of Ornithology has produced a fascinating animated feature that shows the annual migration pattern of 118 different North American species. The migration animation can be viewed
here.
There's also a link on the page which takes you to a similar animation which shows the particular species of bird that's being represented. If you love nature you're sure to enjoy this.
Here are a few questions to ponder while you're watching: How and why did migration, not just in birds but also in butterflies, fish, turtles, whales, dragonflies and numerous other creatures, ever evolve in all these different groups through mindless, unguided processes like random mutation and natural selection?
Did it evolve through mindless, unguided processes?
How do these animals know how to navigate their way back and forth, often returning to the exact patch of territory they departed from six months before? How do the young of the year, which have never made the trip before, know how to do it? How did that ability evolve through mindless, unguided processes?
Birds truly are a marvel.
