The Discovery Center Women's Hiking Group will snowshoe Thursday, January 29th at the Ridgefield Golf Course. Take Ridgebury Rd. and turn left onto Dhly.
Come try out snowshoeing. We will provide the snowshoes, so give it a try.
Wednesday, January 28, 2015
Wednesday, January 21, 2015
Birding with Noah - Jan. 10, 2015
It was a brisk but sunny morning near Lake Windwing, but
birds are not "bird brained" at all.
If you want to find them, look for warm, sunny spots sheltered from the
wind. We had luck on the far, sunlit
side of the lake where there was quite a flurry of activity near the water's
edge. It was surprising to learn that
some birds, like bluebirds, change their diet from insects to fruits and seeds
during the winter months. But others,
like goldfinches, can remain year-round because their diet is all seeds. Berries such as winterberry, juniper, &
holly are an important food source. As
are the highly invasive oriental bittersweet’s orange berries. Noah observed that during his youth, he never
saw robins in the winter but looked for their red breasted appearance and
"cheer-up cheerily" call to herald in the springtime. Possibly climate change, population pressures
and habitat factors account for the observation that robins and other birds
that used to migrate south are staying through the New England winter. We saw cardinals, chickadees, nuthatches,
titmice and dark eyed juncos which Noah called the "usual
suspects". Also, we observed a
white-throated sparrow, song sparrow, and a female red-bellied woodpecker
climbing up a trunk. Noah instructed us
in a few basic good birding tips: 1)
Don’t point your finger at the birds as this seems to scare them away (although
talking does not seem to bother them).
2) Don't use your bird apps to play recorded bird calls, especially
during nesting season, as this possibly effects the establishment of
territories. 3) Don't let everybody
"pish" (a sound that mimics the warning cry of certain species) in
order to flush birds them out. Instead,
if this appears necessary, designate one person to do it. The morning ended with the sight of 4-5 crows
chasing a red tailed hawk with raucous cries and dive bombing the poor fellow
until he moved on. This is called
mobbing. The walk proved that there are
plenty of birds to spot in the winter months, all you have to do is bundle up
and know where to look. Photo (http://en.wikipedia.org/wiki/White-throated_sparrow)
Monday, January 12, 2015
Lovejoy Comet is Here!
Over the next two weeks, the Lovejoy Comet (C/2014 Q2) is
making an appearance in our early-evening skies. If you are fortunate to have a dark sky and
good vision, it is dimly visible to the naked eye. Otherwise
we strongly recommend using binoculars or low-power, wide field telescope. It is a long-period comet with an orbit of
about 11,500 years. So if you happen to
miss it, it will return in about 8,000 years.
Like most comets, it has a greenish head. This is the result of diatomic carbon
molecules (C2) fluorescing in ultraviolet sunlight while it travels
through the near-vacuum of space. The tail, which always points away from the
sun, is tinted blue from the fluorescing of carbon monoxide ions (CO+). Its overall whitish appearance is from dust
reflecting the sunlight. It is 44
million miles away and traveling 3° overhead a night which is fast enough so
that it may move during a viewing session.
It will be nearest to the sun on January 30th, a mere 120 million miles
away. The comet is named after its
discoverer, Australian amateur astronomer Terry Lovejoy. He discovered it on August 17, 2014. It is the 5th comet he has
discovered from his Brisbane, Queensland home.
There are numerous web-sites providing information on how to locate the Lovejoy
comet. You can find them by typing “Lovejoy
Comet 2014” in your search engine. Photo
by Paul Stewart, http://en.wikipedia.org/wiki/C/2014_Q2_%28Lovejoy%29
Wednesday, January 7, 2015
Dark-eyed Junco
This medium size sparrow is Ridgefield’s “Herald of Winter”. Flocks of them arrive in our area in
mid-October and stay until spring has reclaimed the land. The rest of the time, they live a more
solitary life in the northern coniferous or mixed coniferous-deciduous forest
where they breed and raise their young. There
are at least 5 different types of Dark-eyed Juncos. In our area, most are
the Slate-colored race. They’re easy to
recognize by their dark gray plumage that contrasts with its white lower breast,
belly and tail feathers which they plump and flash in flight. The females tend to be a duller color but
still display that burst of white in flight.
A ground loving bird, they forage by hopping instead of walking while
pecking and flicking about the forest leaf litter or gleaming seeds off low
lying branches. They even build their
nests on or close to the ground. The
female picks the site and takes 3 – 7 days to weave her nest shaping it with her body. There she will lay her 3-6 eggs which hatch in
about 11–13 days. After intense feeding
by both adults, the hatchlings will fledge in about 9 – 13 days. Depending on food availability, this whole
process might be repeated up to 3 times during the summertime breeding
season. Juncos are primarily seed eaters
but they do supplement their diet with insects during the breeding season. They are one of the most abundant birds at
our wintertime feeders. They will feed on any
type, be it a platform or hanging onto a perch or just gleaming scattered seeds
on the ground. During a storm, it is
very common to see them hunkered down in the snow under your deck or
landscaping shrubs. For more information
about them visit: http://www.allaboutbirds.org/guide/dark-eyed_junco/id
Jan 2015 Constellation of the Month – Auriga
Auriga is a prominent constellation high
in the Northeast. It is north of Taurus,
our Jan 2014 constellation of the month, and east of Perseus,
our Dec. 2013 constellation of the month. The band of the Milky Way passes
through Auriga between Perseus to the West and Gemini
to the East.
Auriga is shaped like a pentagon, or
a child's drawing of a house. It has one
magnitude 0 star, Capella, and the other 4 are 2nd magnitude. Like so many other stars, Capella is a
multiple star. It is comprised of 4 stars, made up of 2 binary pairs which
orbit around each other. One is a pair
of bright yellow stars in the same category (G) as our Sun. They are each 10 times as large as the
Sun. This may be because they are
expanding on their way to becoming Red Giant stars, which is near the final
stage of the life of stars like the Sun.
The other two are red dwarf stars.
These are small-mass stars which are relatively cool. Red stars – like red flames on earth are
cooler than yellow stars like the Sun, which are, in turn, cooler than blue or
white stars. Being of lower mass and
cooler than other stars, they evolve more slowly and live longer than massive
blue or white stars.
Auriga is home to 3 bright open star
clusters – M36, M37, and M 38. They can
all be seen in one field of view with wide-angle binoculars. Other points of interest are two eclipsing
variable stars. These appear to vary in
brightness when viewed from the earth, because the two stars appear either
side-by-side or one in front of the other.
Other variable stars actually change their brightness by expanding and
contracting.
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