Pigeons

As a city dweller, I sometimes fall into the trap of thinking of pigeons (Columbidae) solely as the rock doves (Columba livia) which are the familiar gray and iridescent birds. Rock Doves originated in North Africa, Central Asia, and Europe.  Humans domesticated these birds in antiquity and carried them everywhere during the age of exploration and colonization.  Like the hero of a dystopian novel, the rock dove then cast off its oppressors (manipulative giant primates who were selectively breeding it to kill it and eat it!) and escaped to freedom and worldwide success.  However the rock dove is not the only pigeon—not at all—there are over 310 species in this family.  They are found everywhere on land except for the polar regions.  Some pigeons are analogous to clever tropical parrots, whereas others live like songbirds, or jungle fowl, or like grouse.  They live in deserts, jungles, forests, sand dunes, scrubland, cropland, caves…pretty much everywhere except for oceans and tundra.  Humankind has destroyed a few species of pigeons like the passenger pigeon, the giant pigeon (A.K.A. the Dodo), and the Socorro dove–an oddity which is extinct in the wild but lives cradled in the arms of pigeon fanciers like former heavyweight champion Mike Tyson, however most doves are tough and resilient.  They thrive in our concrete cities.  They make livings as performers in Vegas! They fly into empty niches and expand to fill them out.

In the Biblical myth of the flood, the first living thing to find habitable land after the flood subsided was a dove—which actually seems right.  Pigeons’ doughty wings have carried them to places where other varieties of bird never reached or colonized.  This omnipresence–combined with a placid temperament and serene beauty–has made the pigeon into a holy bird in both Greco-Roman and Judeo-Christian myth. Indeed, the Holy Spirit, the most abstruse god in the Christian trinity (which already has some really weird divinities in it) is generally represented as a dove.

Depiction of the Christian Holy Spirit as a dove, by Gian Lorenzo Bernini, in the apse of Saint Peter’s Basilica

The secret to the widespread success of the Columbidae however does not merely involve their strong flying ability.  They steal a trick from the mammals’ book: pigeons of both genders nurse their developing nestlings with “crop milk” a nutritious (albeit disgusting) foodstuff made of fluid filled cells sloughed off from the lining of the birds’ crops (a crop, by the way, is a digestive apparatus in birds—a sort of muscular pouch at the top of the gullet).  This strategy means that pigeon parents can feed their offspring even if they can’t immediately find food.  While other baby birds can be wiped out by a temporary food disruption, pigeon families have a safety net.

Pigeons are not technically fowl—which constitutes the galliformes and anseriformes (and most domesticated birds).   It has been a while since I added a new category of animal to Ferrebeekeeper—perhaps I will add pigeons on the side over there.  They are more interesting than I imagined.

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Hanny’s Voorwerp

Dr. Brian May, astrophysicist, CBE

Brian May is an astrophysicist who pursued a career in music. He is the guitarist for the rock band Queen and he is more famous for writing “Fat Bottomed Girls”, “We Will Rock You”, & “Who Wants to Live Forever” than for anything he wrote while obtaining his Astrophysics degrees.  Brian was popularizing Galaxy Zoo on his blog (Galaxy Zoo is an online project which seeks public help in classifying vast numbers of galaxies.  A Dutch fan, Hanny van Arkel (a schoolteacher by trade), became interested in the project and started working on the site when she spotted a huge weird glowing green thing below spiral galaxy IC 2497.  She presented her findings to professional astronomers, who were also perplexed by the ghostly shape.  They duly named the object in her honor “Hanny’s Voorwerp” (which is Dutch for “Hanny’s thing”).

Hanny’s Voorwerp and Galaxy IC2497 (Hubble Space Telescope)

So what is Hanny’s Voorwerp? The leading theory is that the supermassive black hole in the center of IC 2497 created huge jets of energy and gas as it (messily) devoured great masses of matter at the center of that galaxy.  These esoteric plumes interacted with an unrelated stream of gaseous matter hundreds of thousands of light years long (which is longer than our galaxy).  The thin clouds of glass then fluoresced like a krypton sign or a Scooby-Doo ghost.

Hanny Van Arkel

Thanks Brian May and Hanny! This is one fancy voorwerp.