Magnolia Plantation and Gardens

BirdWalk

Newsletter 5.21.2017

Walks conducted by Perry Nugent

Newsletter by Jayne J. Matney Photo above by Ricardo Adami

“Have you ever observed a hummingbird moving about

in an aerial dance among the flowers – a living prismatic

gem…it is a creature of such fairy-like loveliness as to

mock all description.” W.H. Hudson

______________________________________________

A bird of the Americas,

hummingbirds, are our little fairies

of the gardens and forests; they are

almost anywhere in the western

hemisphere where you can find mild

weather with flowers offering

nectar. Classified under the family

Trochilidae, these magical gems of

the air usually only measure

between 7.5 and 13 cm (3 to 5

inches) in length, yet they rapidly

beat their wings at up to 70-80 times

Photo by Cary McDonald per second, and have the highest

metabolism of any animal besides the flying insects! The manner in which they

eat, fly, and look are only the beginnings of the traits that capture our fascination.

These birds eat insects rich in nutrients and nectar rich in sugars, for energy. Tree

sap and pollen are other supplemental treats. The beaks are usually long, slender,

and curved downward and can be quite flexible. According to the Defenders of

Wildlife website, the long tongues which they possess can lick up to 13 times per

second.

“Flight” and “hummingbirds” seem to be synonymous. Flight is one of their

specialties. They can outfly them all! There is not a direction they cannot move,

they can even fly upside down, and they can start and stop on a dime. Their

notorious hovering technique is studied by scientists and engineers alike. With

the use of slow motion photography, the hovering technique illustrates a figure

eight pattern of their wings. So their wings tend to be small, but can rotate in the

socket in specialized patterns without harming or stressing the joint and the

needed muscles. Hummingbirds are, after all, named for the humming sounds

they make due to these rapid wing beats. Unlike most birds, they do not “launch”

themselves off of branches; their wings do all of the work.

Photo by Cary McDonald

Hummingbirds tend to be colorful birds, showing an iridescence to those feathers.

The magnificent coloring of hummingbirds, especially the males, is primarily for

courtship and territorial reasons. Colorations range from bright emeralds, reds,

purples, golds, and blues. Whether to attract their mate or to discourage others in

their territory, these colors are used for cues to the others in their area. In

addition to color cues, behaviors are very distinct when it comes to hummingbird

interaction. Territorially, hummingbirds can be very aggressive to other

hummingbirds and to birds of different types as well. They have even been seen

chasing of falcons if they feel the need. Of course, the males are going to take

advantage of their expert flying skills to attract females. Male hummingbirds are

known to dive over prospective mates at outlandish speeds (see fun facts) and

using aerial displays for her while making vocalizations such as chirps, squeaks,

whistles, and buzzing, and feather sounds such as chirps and high pitched sounds

coming from the feathers. Many of the high pitched sounds are made by tail

feathers or wings due to airflow at such a great speed.

Photo by Cary McDonald

Besides their eating practices, incredible flight speeds and patterns, and gorgeous

coloration, these birds have proven to have incredible eye sight. Since they

cannot waste any time and extra energy in locating food, their vision along with

exceptional brain processing function, due to speed at which they fly, they can

maneuver quickly with intense spatial resolution. These birds can also see parts of

the ultraviolet spectrum of light and they make use of cues and landmarks along

the way. Therefore, their flight for food is not a random or chaotic method for

hunting their food. Don’t be surprised if the same hummingbirds come back to

your feeder or garden from past years expecting the same prize. It has been told

that they may appear before you are ready, looking for your feeder in the same

location it was presented in past years. They will show up at old haunts expecting

the feeder to be ready and available when they arrive! In South Carolina, it is

recommended to put out feeders by mid-April.

While watching hummingbirds, you may only hear parts of their song because

much of it may be out of our hearing spectrum or range. They also produce

ultrasonic waves which are thought to aid these birds in catching insects in mid-

air.

Even though hummingbirds have so many wonderful aspects to their morphology

and behaviors, there are a few disadvantages for hummingbirds.

Because their metabolism is so high causing their heart rates, oxygen intake,

breathing rate and body temperature to be high as well, their life expectancy is

lower than many other birds. The hummingbirds of our state are generally

expected to have a life span of 3 to 5 years, if they live past the first year.

Depending upon the specific species, longevity records are somewhere between

9 and 12 years. In addition, hummingbirds have a disadvantage when it comes to

their feet and legs. They have short legs and small feet, which only allows for

perching and shuffling around on a branch. So they will not hop or walk by normal

standards. Contrary to what most people believe, these tiny birds actually perch

most of their day. Another disadvantage for them is the fact that they must have

ways to conserve energy since they expend so much in food gathering. So they

have adjusted by going into torpor states which can decrease their metabolic rate

and therefore other bodily functions to “give it a rest”. This is a sort of daily

hibernation for them.

A limitation for these tiny birds is winterizing which is very important. Because

they are so incredibly small and metabolize at high rates, they cannot have a

range that includes cold weather at any time. They would not survive harsh

winter weather. Therefore, most winter in the tropics. Our more prominent

hummingbird, the Ruby-throated Hummingbird, winters between Mexico and

northern Panama.

Photo by Cary McDonald

There are over 300 species of hummingbirds and 12-17 of those are known to

summer in North America. According to the Cornell Lab of Ornithology, the Ruby-

throated Hummingbird is “eastern North America’s sole breeding hummingbird.”

Hummingbirds range from latitudes of southeastern Alaska and southern Canada

to southern Chile depending upon the species. They are found all across the U.S.

and in the Caribbean. They are lone travelers, so you will not see them migrating

or living in flocks like many migratory birds. This also affects the tendency to see

them in wide ranges, but few and far between unless they are enticed with food

products. Some of the southern South American birds actually migrate northward

during the summer months.

Hummingbirds look for habitat that will provide constant supplies of food and

good temperatures. Their favored habitats are tropical and subtropical forests,

open deciduous or mixed forests, meadows, grasslands, parks, gardens, and

backyards. There is much talk about destruction of these habitats affecting the

overall population of these birds. Once the hummingbird finds a suitable place for

nesting, the pair will mate, then the male migrates away while the female is left

to do the nest building, incubating, and rearing of the young. Typically the nest is

a cup-like structure of mosses, lichen, small soft plant fibers, and leaves and the

mother will press and smooth the surfaces with her neck and chest. Sometimes

spider webbing is used as well to give the nest some flexibility in size and shape.

They are typically located 10 to 90 feet above the ground and are camouflaged

and can take anywhere from 6 to 10 days to complete. The gestation period is

anywhere from 13 to 22 days and the clutches are small (1-3 eggs). Egg size and

color vary from species to species. Once the young hatch, they are fed small

arthropods and nectar from the beaks of the mother. The young will start to show

an interest in flying between 18 and 30 days.

In South Carolina, the most prominently seen hummingbirds are the Ruby-

throated and Rufus Hummingbirds. However, other hummingbirds have been

seen here as well. According to “Hummingbirds Found in South Carolina” by

Beauty of Birds’ website, those which have been the more sighted here in South

Carolina are: Ruby-throated (native), Rufus, Broad-billed (accidental vagrants),

Buff-bellied (accidental vagrant), Blue-throated (rare vagrant), Black-chinned (rare

vagrant), Calliope (rare vagrant), and Allen’s (rare vagrant).

Where do hummingbirds fit in to our world? Upon close examination of fossils, a

few have been recovered despite the fact that their bones are so tiny and fragile.

Fossils have been recovered in Brazil and the Bahamas from the Pleistocene. Two

hummingbird fossils were recovered from the same clay pit south of Heidelberg,

Germany and tucked away until a scientist by the name of Dr. Gerald Mayr

located it in a drawer at a museum in Frankfurt. It was estimated to be 30 million

years of age. There are differences in the taxonomy placement of these birds.

Traditionalists prefer them in the order Apodiformes with the swifts while many

current taxonomists prefer them in their own order- Trochiliformes. Either way,

they have captured our interest and hearts. Historically and culturally,

hummingbirds have symbolized vigor, energy, fertility, skill, and the warrior spirit-

especially in the Aztec culture. Wikipedia explains that the Aztec god of war was

depicted as a hummingbird and fallen heroes as hummingbirds or butterflies in

their returning life forms. Helmets were constructed with hummingbird-like heads

and shields were decorated with hummingbird pictures on them. One of the

“Nazca Lines” that are seen from aerial photography in the earths’ landscapes

depict something similar to a hummingbird. The countries Trinidad and Tobago

use the hummingbird in their coat of arms and money, while the airlines coming

out of the Caribbean use hummingbirds as their emblem.

Our Ruby-throated Hummingbirds saw a steady increase in populations between

1966 and 2015 when the North American Breeding Bird Survey was done.

Partners in Flight estimate the population to be approximately 20 million in

number. Ironically the downfall for these birds tends to be the fact that we want

to provide food through feeders to attract them. The placement and style of the

feeders is critical. They can be easy targets near the feeders for cats, and they can

fall victim to hitting windows of the house if feeders are placed near them. The

more aware we can be about these feeders, the better off the hummingbirds will

be and our backyard observations of these creatures can be safe for them. We

can actually take a part in their long journeys for migration. Planting gardens

which attract these birds in a natural format can be done if you know which

varieties can benefit and attract them. According to the Hummingbird Society, the

best families of plants are: Abutilon (Chinese Bell Flower, Chinese Lantern, Indian

Mallow, and Flowering Maple), Agastache (Cusick’s Giant Hyssop, Hummingbird

Mint, Threadleaf Hyssop), Aloe, Anisacanthus (Desert Honeysuckle, Flame

Anisacanthus), Aquilegia (Sierra Columbine, Crimson Columbine, Fragrant

Columbines), Caesalpinia (Bird of Paradise, Broadpad Nicker, Yellow Peacock),

Callistemon (Crimson Bottlebrush, Weeping Bottlebrush, Red Bottlebrush),

Chilopsis (Desert Willow), Fuchsia, Hamelia (Firebrush), Justicia (Water Willow,

Shrimp Plant), Kniphofia (Red Hot Poker, Torch Lily, Knofflers), Lobelia (Indian

Tobacco, Fool’s Bane, Vomitwort), Lonicera (Honeysuckle), Monarda (bee Balm,

Oswego Tea, Bergamot), Penstemon (Beard-Tongue), Salvia (Sage), Tecoma or

Tecomaria (Yellow Trumpetbush).

But that does not mean to say that there are not others. You will need to see

where you are geographically and what type of soil is in your area as to what will

give you the best direction for plant types.

Fun Facts!

While in flight, the hummingbird’s oxygen consumption is 10 times higher

than an elite human athlete!

Hummingbird hovering is estimated to be about 20% more efficient than a

helicopter drone.

Hummingbirds have twice the diving speed of a Peregrine Falcon.

The Rufus Hummingbird makes the longest migratory journey known of any

bird in the world of 3,900 miles one way.

A hummingbird’s lower beak bends as much as 25 degrees to enable better

insect capturing.

Many eastern hummingbirds prefer migrating southward across the Gulf of

Mexico rather than along the coastline. They will cross in a single flight

which is about 500 miles and takes approximately 18-22 hours.

Some hummingbirds have been known to place their nests on chain

lengths, wire going into houses, and outside cords.

Calliope Hummingbirds build a series of 2 to 4 nests stacked up on top of

one another.

Costa’s Hummingbirds prefer to build up to 6 nests within a 100 foot radius

and decide which to use according to best protection and which ones to be

mock nests for predator confusion.

Hummingbirds are estimated to have a metabolism roughly 100 times that

of an elephant and therefore consume 1.5 to 3 times their body weight

each day!

Information and statistics gathered from: “Hummingbirds in SC”, Google Search 5.16.2017; “Hummingbird Nest Facts”, Birds and Blooms, George Harrison

and Kris Wetherbee 2017; Ruby-throated Hummingbird, All About Birds, The Cornell Lab of Ornithology; “Basic

Facts About Hummingbirds”, Defenders of Wildlife; “Hummingbird Flowers- The Best 18 Plant Families for

Natural Nectar”, The Hummingbird Society; “Hummingbirds Found in South Carolina”, Beauty of Birds, 2017;

“Hummingbird” Wikipedia 2017.

On Sunday, May 21st, 2017, the eight bird watchers at Magnolia Plantation set out on the trails

to see what the property had to offer them on this particular go around. The highlights of the

tour were:

The Little Blue Heron eggs that were seen in the nest last week have hatched and the

little ones are healthy and active.

Two mommy Wood Ducks and each of their broods were found on Ravenswood Pond.

Mississippi Kite were spotted 5 times on the property. We are not sure how many

individuals were seen, but they are always a beautiful sight.

A European Starling finally showed up this week for

the count.

Two Great-crested Flycatchers were seen in the

Audubon Swamp at the cemetery.

Five Prothonotary Warblers were seen in the

Audubon Swamp. The new location for this year’s

nests are not known.

An Orchard Oriole was found between the exit road

and the Audubon Swamp! First sighting in a long

time!

Others on the List:

Anhinga

Great Blue Heron

Great Egret

Green Heron

Black-crowned Heron

Turkey Vulture

Black Vulture

Osprey

Laughing Gull

Mourning Dove

Red-bellied Woodpecker

Downy Woodpecker

White-eyed Vireo

Red-eyed Vireo

American Crow

Fish Crow

Carolina Chickadee

Tufted Titmouse Prothonotary Warbler and Chickadee

Carolina Wren Photos above by Ray Swagerty

Blue-gray Gnatcatcher

Northern Parula

Yellow-throated Warbler

Common Yellowthroat

Northern Cardinal

Red-winged Blackbird

Common Grackle

Brown-headed Cowbird

Orchard Oriole and Carolina Wren

Photos by Ray Swagerty