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Wildlife
Calendar of Events
USFWS Photo
This calendar is meant to provide
visitors with a general guide to seasonal events on Desert National Wildlife
Refuge.
JANUARY
Annual limited desert bighorn
sheep hunt closes. Rams break away from ewes and yearlings and form "bachelor"
groups, generally on the lower hills and mountain slopes. Phainopeplas,
year-round residents in southern Nevada, are particularly numerous during
the winter months, feeding on mistletoe berries in mesquite stands at
the Corn Creek Field Station.
FEBRUARY
Lambing season for desert
bighorn sheep begins. Cool season, annual grasses begin to green up on
the lower, sunny exposures. Weather in the high country (up to nearly
10,000 feet) is still unpredictable with freezing temperatures and snow
storms common.
MARCH
Lambing season reaches its
peak by the end of the month. Warblers, flycatchers, and other neotropical
migratory birds begin arriving at the Corn Creek Field Station, attracted
by the compound's orchard, ponds, and pasture. Western and mountain bluebirds
can be found in the pinyon-juniper habitats, along with wandering flocks
of pinyon jays. Weather in the low country is generally pleasant, but
occasionally quite windy. Refuge staff and volunteers begin maintenance
and construction of water sources for summer, resident wildlife, including
bighorn sheep, coyotes, and house finches. The desert tortoise, a federally
listed species, emerges from its winter burrows.
APRIL
Lambing season tapers off.
Spring wild flowers begin to bloom, particularly along road side depressions.
The number and variety of wild flowers is highly dependent upon the amount
of rain received earlier in the year. Large numbers of neotropical migratory
birds, such as western tanagers, yellow-rumped warblers, and northern
orioles pass through the Corn Creek Field Station as they head north to
their nesting areas. Resident birds at lower elevations, such as black-throated
sparrows and loggerhead shrikes, begin nesting.
MAY
The mulberry trees in the
Corn Creek orchard have borne fruit, attracting resident and migrant birds
like a magnet. The Corn Creek pasture has greened up, providing forage
for numerous cottontails and black-tailed jackrabbits, as well as a good
evening hunting area for coyotes. Young Say's phoebes, rock wrens, common
bushtits, and blue-gray gnatcatchers leave the nest and begin venturing
around Peek-A-Boo Canyon. Ash-throated flycatchers and ladder-backed woodpeckers
can be found at the lower elevations, particularly Yucca Forest. International
Migratory Bird Day is celebrated during the month.
JUNE
Snow is almost gone from the
high country and desert bighorn sheep begin moving up to forage on growth
stimulated by the melt. Black-throated gray warblers, juniper titmice,
hairy woodpeckers, gray flycatchers, and spotted towhees are nesting in
the pinyon-juniper habitat zones. Bullfrogs can be heard croaking loudly
from the Corn Creek ponds, especially towards dusk. Wild flowers remain
in bloom until month's end.
JULY
Migrant songbirds depart as
temperatures begin to soar. Water sources in the mountains start to receive
heavy wildlife use. Bighorn sheep can be viewed by spending the morning
watching these water sources and the surrounding steep terrain. "Bachelor"
groups of rams break up as they seek mates, usually in close proximity
to the water. Scott's orioles, cactus wrens, and ladder-backed woodpeckers
can be seen in the Joshua trees. Tortoises return to their burrows, but
other reptiles, particularly the western whiptail, zebra-tailed, and side-blotched
lizards, can be easily observed.
AUGUST
The bighorn sheep breeding
season, or rut, reaches its peak. Summer monsoons can occur during this
time, causing sheep to disperse temporarily from water. Resident birds
abound in the high elevation, roadless wilderness. Species include Cassin's
finch, brown creeper, pine siskin, Clark's nutcracker, broad-tailed hummingbird,
canyon wren, and white-breasted nuthatch.
SEPTEMBER
Temperatures moderate, generally
by month's end. Mourning doves begin their southward migration. Several
species of flycatcher, common to the western United States, pass through
Corn Creek Field Station. Tortoises may reappear for a brief feeding period
prior to winter hibernation.
OCTOBER
Annual bighorn helicopter
surveys are conducted. After these surveys, state and Federal biologists
cooperatively conduct bighorn net-gunning and transplanting operations
on an intermittent basis. Spotted towhees congregate in Peek-A-Boo Canyon.
Temperature decline and weather conditions become generally pleasant.
National Wildlife Refuge Week is celebrated during the month.
NOVEMBER
Annual limted bighorn sheep
hunt begins. Lambs have been weaned and closely resemble ewes from a distance.
Night time temperatures are cold and below freezing at the upper elevations.
Bullfrogs begin estivation in the muddy ditch and pond bottoms at Corn
Creek Field Station. Rabbit populations have been significantly reduced
by summer predator activity.
DECEMBER
Christmas bird count is conducted
by members of the Red Rock Audubon Society and other volunteers. Bighorn
sheep have moved to lower elevations for the winter and rutting activity
has, for the most part, terminated. The holiday season slows Air Force
training on the western one-half of the refuge, allowing the Fish and
Wildlife Service to provide bighorn sheep hunting opportunities in this
area.
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