The buzz of cicadas gave voice to the heat as we strolled through the
shade of giant oak trees. Arkansas in June is a hot soup of humidity. Luckily,
it is a short, flat walk from the lodge to the classroom at the Potlatch
Conservation Education Center on Cook’s Lake.
This old duck-hunting lodge—once owned by Lion Oil Company—is now
operated by the U.S. Fish & Wildlife Service, the Arkansas Game and Fish
Foundation, and the Arkansas Game and Fish Commission (AGFC). The educational
activities here, which are focused on youth and the mobility impaired, are funded
by a statewide 1/8th cent Conservation Sales Tax.
Wearing a uniform shirt with a hummingbird embroidered opposite the AGFC
logo, Miss Tana Beasley greeted us warmly as we stepped into the classroom.
Long rows of tables and chairs filled the center of the room, while every
possible surface along the walls was covered in teaching tools, taxidermy, and
snake ID posters. I felt instantly at home, despite the giant alligator and
rattlesnake skins spread across a display case.
Rattlesnake rattle on top of an alligator skin. |
A retired biology teacher, Miss Tana is the only master hummingbird
bander in the state. Such tiny research subjects require a different permit
than other birds. Tana has been leading hummingbird banding programs here since
2008. School field trips, civic groups, and now this little group of visitors
from the Outdoor Writers Association of America conference in Little Rock, all
benefit from her knowledge and skill.
Due to its location along the Mississippi River flyway, Arkansas sees
plenty of migratory birds—hence this facility’s start as a duck hunting lodge.
Hummingbirds are the smallest avian guests, and some of them stay to breed. Others may just pass through on the way to our feeders in the Northwoods!
Weighing only 3.5 grams—about as much as a nickel—a ruby-throated
hummingbird can fly 18-20 hours straight as it crosses the Gulf of Mexico to or
from its wintering grounds on the Yucatan Peninsula. Built to power that
flight, the tiny bird’s pectoral muscles make up 25% of their bodyweight (compared
to 5% in humans.)
On the mainland, those hummingbirds will fly straight to places where
they’ve found food before, and peer indignantly into your window if the feeder
isn’t full. They have a remarkable memory, enabled by a relatively large brain
for their tiny size. Before banding studies were done, scientists guessed that they
could only live 3-5 years. Now we know that they can live up to 12 years and
return annually to the same feeders.
After the background lecture, Tana situated herself at the banding
table, with all of her tools laid out neatly. I saw many similarities between
her and Jim Bryce, who bands songbirds with our Master Naturalist course on the
Moquah Barrens each spring. Soft-spoken, methodical, gentle, and precise, these
two show a special reverence for their subjects and excitement for what birds
can teach us.
Miss Tana bands a hummingbird. |
Danielle Taylor takes photos while Wil Hafner catches a hummingbird for banding. |
We enjoyed our close-up view of the others as they stuck their heads
through the wire mesh that was precisely sized to avoid injury. Going
eye-to-eye with a young male, I was thrilled to examine his striated throat up
close. Tana had explained that these dark stripes on his white chin are sheaths
surrounding what will become iridescent red feathers once he matures.
After
this brief encounter, Wil opened the top of the cage so the parade of hummers
could zoom away.
Inside, Tana used a little piece of nylon stocking to swaddle the hummer
while she clasped a tiny band on its leg; measured wings, tail, and beak;
weighed it; and then checked for fat by blowing on its belly through a drinking
straw. As she manipulated the little guy, we gasped in awe as his throat
feathers caught the light and turned from black, to purple, to ruby. This was definitely
a mature male. So I was confused to see a featherless patch of skin on his
belly revealed from Tana’s puffs of air.
It's important that you don't put pressure on a hummingbird's tiny chest when you hold them. |
A new bracelet! |
Tana makes sure she has bands ready to go. They arrive in a flat sheet. She separates them, closes them around a tapestry needle, and files off rough spots with a nail file. |
Measuring wings. |
Measuring tail. |
Measuring beak. |
Weighing the little guy. Males weigh about as much as a penny, females are closer to a nickel. |
Blowing the tummy feathers aside helps banders assess the body condition of birds by looking at fat through their skin. Most male birds do not have a brood patch, but hummingbird males do!
The iridescent throat feathers of a male ruby-throated hummingbird. |
In most birds—like the ones Jim Bryce catches—the females will pull out feathers
on their brood patch to allow for the efficient transfer of body heat to their
eggs. With their long beaks, though, hummingbirds can’t reach their own bellies.
Their brood patch is automatic, and it occurs on both males and females, even
though the guys never sit on the nest.
When we recaptured a female who had been banded just 10 days prior, the
puff of air revealed the pale lump of an egg developing under her skin. Tana
worked more quickly then, not wanting to interrupt this mama’s important
business.
This female has an egg developing in her belly! |
You can also see the little egg lump showing through the brood patch of this female as she explored the trap. |
Each of us students released a banded hummingbird during the program. My
mom was tasked with releasing this mom. Outside the classroom, Tana arranged my
mom’s hand out flat and then carefully pressed the tiny bird’s warm belly
against her skin. Mom’s smile grew as she felt the heat and racing heartbeat. We
readied our cameras. Tana let go. Immediately, the tiny jewel zoomed off in a
shimmer of green, leaving my mom grinning with delight.
For as long as I can remember, we’ve had a hummingbird feeder near the
kitchen window so that Mom (and all of us) could enjoy the antics of her
favorite birds. They are fun to watch, of course, but there is nothing quite
like actually having a bird in your hand.
Emily’s second book, Natural
Connections:
Dreaming of an Elfin Skimmer, is now available to purchase at www.cablemuseum.org/books and will soon be available at your local independent
bookstore, too.
For more than 50 years, the Cable Natural History Museum has
served to connect you to the Northwoods. Come visit us in Cable, WI! Our new
Curiosity Center kids’ exhibit and Pollinator Power annual exhibit are now
open!
No comments:
Post a Comment