Tiny Travelers -- Fall Warbler Migration
The annual fall bird migrations are underway. For highly visible
species, like mourning doves and blue-winged teal, the passage is hard
to miss. But there is also another mass migration currently in progress
that will, unfortunately, go largely undetected by most Iowans. That
migration is the southbound flight of the warblers.
As any
sharp-shinned hawk will tell you; fall warblers come in many flavors.
During the past several days, we've seen American redstarts, mourning,
Connecticut, prairie, magnolia, and Wilson's warblers --- all observed
within a single small patch of dogwood.
Denizens of deep shaded
woodlands and thick understory, warblers are as secretive as they are
beautiful. Many species travel only at night using the stars,
constellations, the moon and magnetic fields to faithfully guide them to
ancient and far away wintering grounds. Daylight hours are spent
busily refueling on protein rich insects. Migration exacts a heavy
physical toll on these tiny travelers and water is always a big draw for
fall warblers. During the past week, I've seen up to four warbler
species simultaneously bathing or drinking from my backyard bird bath.
Hyper
active to a fault, warblers never stop moving for more than a second or
two. Getting a good look at one presents a unique challenge; while
obtaining any kind of usable photo represents the ultimate exercise in
frustration.
Final Thought: "No fortuitous concourse of elements
working blindly through any number of millions of years could quite
account for why warblers are so beautiful. No mechanistic theory, even
bolstered by mutations, has ever quite answered for the colors of the
cerulean warbler, or the vespers of the woodthrush, or the swan song, or
--- goose music."
Aldo Leopold, from A Sand County Almanac
I Remain,
Pastor Steve