Redwood National and State Parks is home to a subspecies of elk called Roosevelt elk. The population of Roosevelt elk in California dropped to only 15 animals by 1925, but has since rebounded to over 1,000 due to protection of habitat. Elk can sometimes be seen grazing along Highway 101 or at locations like Elk Prairie, Davison Road, and Gold Bluffs Beach within the parks. Visitors are advised to observe elk from a safe distance and never approach, as they are wild animals that can become aggressive if feeling threatened.
Strange Events in Bio World chapter 4 Acquiring home 13SantoshBhatnagar1
HOME SWEET HOME -ANIMALS ALSO REQUIRE ONE BUT THE STRANGE WAYS THEY ADOPT FOR ACQUIRING ONE ARE FASCINATING SURPRISING AND WONDERFUL AS THE EXAMPLES GIVEN HERE WIIL SHOW
Strange Events in Bio World chapter 4 Acquiring home 13SantoshBhatnagar1
HOME SWEET HOME -ANIMALS ALSO REQUIRE ONE BUT THE STRANGE WAYS THEY ADOPT FOR ACQUIRING ONE ARE FASCINATING SURPRISING AND WONDERFUL AS THE EXAMPLES GIVEN HERE WIIL SHOW
A Research Paper Entitled " A Geographical Study on Equines Conservation Issues and Challenges in (EPC) NRCE, Bikaner Rajasthan " presented by Ram Avdhesh Singh* in the 44th, RGA National Conference held at S.R.L.S. Govt. College Kaladera, Jaipur Rajasthan on 6 Oct. 2016.
A Research Paper Entitled " A Geographical Study on Equines Conservation Issues and Challenges in (EPC) NRCE, Bikaner Rajasthan ", presented in the 44th, RGA National Conference at S.R.L.S. Kaladera, Jaipur Rajasthan on 6 Oct. 2016.
Why did eagle populations decline in the 1960s Why do eagles cong.pdfvikasbajajhissar
Why did eagle populations decline in the 1960\"s? Why do eagles congregate at the Shepaug
River and Hudson Rivers in winter? When do they reproduce? What are their nests like? How
many young do they have and when do they hatch out? What types of behavior do adult eagles
engage in in winter? What percent of the time do they spend searching for food? What habitat
do they prefer for nesting sites? Why?
Solution
Answer:
1. Why did eagle populations decline in 1960s: Different reasons contributed to a steep decline in
Eagle population in 1960s:
- More than 100,000 bald eagles were killed in Alaska from 1917 to 1953 as Alaskan Salmon
fisherman feared that Eagles were a threat to the Salmon population
- In the 1950’s the insecticide DDT (dichlorodiphenyltrichloroethane) was introduced and used
widely to combat a broad spectrum of insect pests. DDT was indiscriminately used and it caused
serious environmental effects DDT interferes with the calcium processing of birds and results in
deformed eggshells. The chemical by products of DDT persisted in the aquatic ecosystem long
after its application. Since bald eagles are at the top of the aquatic food chain and feed primarily
on fish, they received concentrated doses of the chemical. When the female eagle laid a thin,
deformed eggshell, she crushed it under her own weight when incubating the egg. Since bald
eagles pairs breed only once per year, with many bald eagle pairs not reproducing successfully,
the bald eagle population declined steeply throughout the 1960’s and 1970’s.
2.Why do eagles congregrate at the Shepaug River and Hudson river in the winters.
The same elements that support breeding pairs - clean air and water, ample food supply, large
undisturbed stands of trees - also attract bald eagles looking for a winter home.
The Hudson River region still provides tracts of relatively undisturbed land for roosting,
perching and nesting.These habitats are especially attractive during winter, when human activity
is limited.
Each year, bald eagles migrate from their northern nesting areas to New York\'s rivers and
reservoirs in search of open water, food and roosting sites. Even during the coldest months, open
water can be found near power plants that discharge water during energy production, or where
the natural flows of tributaries enter the river. In recent winters, more than 100 wintering eagles
have been counted along the lower Hudson.In recent years, the stretch of the Hudson from
Kingston to Croton has been increasingly popular with bald eagles, probably because sections of
the river are kept open by discharges from power plants, and railroad tracks provide an ample
supply of dead animals (carrion) for scavenging eagles.
3. When do they reproduce? What are their nests like? How many young do they have and when
do they hatch out?
An eagle is sexually mature and ready to breed at about 4 to 5 years of age. For bald eagles, the
complete white head and tail are signs of sexual maturity. Golden eagles.
Similar to Elk in the Redwoods National and State Parks (20)
1. Redwood National Park Service
US Department of the Interior
Department of Parks and Recreation
State of CaliforniaNational and State Parks
R
edwood National and
State Parks is home to a
subspecies of elk known
as Roosevelt elk (Cervus elaphus
roosevelti). Herds of these mag-
nificentanimalsoncerangedfrom
San Francisco Bay toVancouver
Island,BritishColumbia,andeast
to the Cascade Range in Oregon
andWashington.Todaytheirrange
islimitedtothecoastfrom
HumboldtCounty,Californiato
VancouverIsland,BritishColum-
bia.
Once Nearly Extinct
By 1925, the number of
Roosevelt elk in California had
dropped to as few as 15. One of
the last elk herds was located in
Prairie Creek Redwoods State
Park. Fortunately, protection of
habitat in the park and surround-
ing areas has allowed the Cali-
fornia Roosevelt elk population
to rebound to more than 1,000
animals.
Characteristics
Elk are the second largest mem-
bers of the deer family. Moose
are larger. Adult males (bulls)
weigh 740-1,100 pounds; fe-
males (cows) weigh 380-640
pounds. Both sexes have a dark
head, neck and legs, with a light
brown body and a cream-colored
rump. Mature males boast large
multi-branched antlers, while the
shorter antlers of young males
(called spikes) usually are
unbranched. Females do not
have antlers.
Where to See Elk
Members of the Roosevelt
elk herd in Redwood Na-
tional and State Parks some-
times can be seen grazing or
resting along Highway 101
in the southern part of the
parks. But the best places to
observe them are:
Elk Prairie: Along
Newton B. Drury Scenic
Parkway, south of the entrance
to Prairie Creek Redwoods
State Park.
Davison Road: Along
either side of Davison Road,
just west of Highway 101.
Gold Bluffs Beach:
ContinueonDavisonRoad
four miles on an unpaved road
toGoldBluffsBeach
(motorhomesandtrailersare
notadvised).
Observe Them Safely
Although elk may appear tame,
they are wild animals and can be
dangerous to humans. Like
people, elk have their own needs
for privacy and protection, and
they will act to defend them-
selves if they feel challenged or
threatened. Observe elk from a
distance with binoculars or
photograph them with a tele-
photo lens. Back away if they
get too close. Never approach
wild elk! Bulls may be aggres-
sive; females can also be dan-
gerous. They can kick, slash,
and stomp with their sharp
hooves. Cows can be particu-
larly defensive during the
summer months when they are
protecting their young calves.
Habitat Management
Elk occasionally spend time in
the forests and sometimes can be
seen on the beach, but they
prefer open grasslands. Thus, the
protection and maintenance of
the parks’ prairies are extremely
important to provide good
grazing habitat. Currently, park
managers are using methods
such as prescribed burning and
tree removal to reopen and
maintain the prairies. Fire
benefits elk because the nutri-
tional quality of the grasses
increases considerably after the
burn. Biologists also suspect that
burning the prairies may reduce
parasites that are harmful to elk.
Threats to Survival
Biologists believe that road kills
and poaching are the major
causes of death for elk in this
area. You can reduce this prob-
lem by driving at or below the
speed limit and watching for
wildlife along the roads. In
addition, if you observe any
suspicious behavior related to
wildlife poaching, please report
this information to a ranger
immediately.
Elk in the Redwoods
2. The Elk Calendar
Seasonal changes mark the
behavior of elk herds, as
they have since long before
humans were around to
observe them.
Autumn
The breeding or rutting period
occupies elk from late August to
mid-October. This is when bull
elk compete for control of
groups of females, called “har-
ems.” To attract mates and warn
away other bulls, mature male
elk make a bellowing, whistling
sound called bugling. Bugling,
pit wallowing, and antler clash-
ing all are preludes to combative
contacts between pairs of rival
bulls. A challenger may ap-
proach a harem bull, bugling,
urinating, and tossing turf with
his antlers. The harem bull likely
will advance and bugle. The pair
may circle and one may charge.
If the other holds his ground, the
resulting clash of antlers may
wound or even kill an elk, but
before this happens one of the
bulls usually admits defeat and
retreats.
Winter
Due to the mild climate of the
Northern California coast, elk in
this area do not need to migrate
although they do grow a second
insulating layer of warm fur.
Even with our mild climate, the
limited amount of new plant
growth available for food makes
this a stressful time of year for
elk.
Spring
In February and March, males
shed their antlers. About a week
later they begin to grow new
ones at the rate of 10 to 12
inches per month. Their growing
antlers, formed from keratin, a
bone-like material, are nourished
by blood vessels in a soft mem-
brane covering called “velvet.”
Scentless calves, born in May
and June, remain hidden from
predators for the first week or
two while their mothers graze a
short distance away. Later, cows
and calves join the herd of
females and young males, which
is led by an older cow. Older
males form separate bachelor
herds or remain solitary through
the summer.
Summer
By late August the bull elk’s
antlers stop growing. The blood
vessels inside the velvet dry up,
causing it to fall off. Bulls often
rub their antlers on trees and
bushes to remove the dried
velvet. Soon the rutting season
begins and the ancient cycle
continues.
Published by Redwood Park Association in cooperation with Redwood National and State Parks, National Park Service 2004.
EXPERIENCE YOURAMERICA
revised 9/02