Sunday, April 29, 2007
What kind of caterpillar is that?
Once the cutworm caterpillar goes trough metamorphosis, it becomes a moth. They are night-flying moths which feed on nectar and do no damage to garden plants.
To see some really cool pictures of caterpillars, check out this site:
http://www.whatsthatbug.com/caterpillar_2.html
If you have a picture of an insect you need help identifying, see this site:
http://bugguide.net
Saturday, April 28, 2007
House Finch Nest Two
The first nest was on our front porch light, this second nest they are in the middle of building is on our back deck. In case you ever wondered how a bird builds a nest, here is a a short clip that will give you some insight:
Spring Azure
These little blue butterflies drink nectar from such plants as butterfly weed, clover, and a variety of asters. Their caterpillar host plant preferences are dogwood, blueberry, and cherry trees.
Saturday, April 21, 2007
Splish Splash
Once in the water, the bird fluffs its feathers to expose the skin, submerges its belly and breast in the water, rolls back and forth by dipping its head into the water and creates a shower by flicking its wings. When finished, the bird shakes off the excess water and then flies off somewhere to dry and preen.
In our backyard it has been especially dry due to lack of rain, so when the bird bath is full of water, there is a line of birds ready for a bath and a drink! Here is a video I made this afternoon of the activity at the bird bath. In it you will see: Brown-headed Nuthatch, Carolina Wrens, Brown Thrashers, Northern Mockingbirds, House Finches, Northern Cardinals, and Chipping Sparrows.
For information about bird baths and to learn about creating a backyard habitat for wildlife see:
http://www.audubon.org/bird/at_home/pdf/GFLchap3.pdf
Sunday, April 15, 2007
Nest Update: House Finch
First of the Season
To learn about the Monarch Migration through a great slide show click here: Monarch Annual Cycle
The monarch in our backyard was newly arrived from Mexico. It was looking for a place to lay its eggs. The only type of plants monarchs can lay their eggs on are Asclepias also known as milkweed. They will lay one egg per leaf and can lay many eggs in one day. A single Female will lay around 700 eggs before she dies. And 700 eggs from just one butterfly means monarchs need a lot of milkweed!
You can find milkweed at your local garden shop, or you can grow them from seed.
To find out more about the Monarch Migration, see Journey North's website. There you can learn more about monarch natural history, see live maps of monarch sightings, and even report your own sightings!
www.learner.org/jnorth/monarch/
Saturday, April 14, 2007
Nest Update: Brown-headed Nuthatch
Brown-headed nuthatches lay 3-7 eggs. The eggs are incubated for 2 weeks. Once hatched, the parents bring the nestlings a variety of small soft-bodied grubs, spiders, and caterpillars.
In this video I made this morning, you will see just what the nuthatches are feeding their young.
Once the nestlings get a little older, the parent will begin feeding them hard bodied insects such as cockroaches; they will also feed them pine seeds (which are a large part of the adult diet). The nestlings will fledge the nest 18 days after hatching and will continue to rely on the parents for food over the next 2–4 weeks. Family groups remain together throughout summer, so we look forward to seeing the nuthatches grow up.
References:
Withgott, J. H., and K. G. Smith. 1998. Brown-headed Nuthatch (Sitta pusilla). In The Birds of North America, No. 349 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.
Tuesday, April 10, 2007
Nest Update: House Finch
These are the 10 day old chicks.
They have grown so much, the female no longer sits on the nest: there is no room for her! They will leave the nest and become fledglings at in about 6 days, when they are 16 days old.
And if you think that looks like bird poop on the nest, you would be right. As in most birds, when House Finch nestlings defecate, the feces are contained in a membranous sac. The parents eat the nestlings' fecal sacs for about the first five days. This is because most of the food has not been digested, so it is still nutritious for the parents. But as the nestlings get older they digest more, so most songbird species then stop eating the sacs and carry them away to dispose of them. But House Finch parents do not remove them, and the sacs accumulate around the rim of the nest.
References:
All About Birds
Sunday, April 8, 2007
Barn Owls
Despite being common in some areas and often nesting close to human habitations, the secretive, nocturnal activity of Barn Owls cause to be them inconspicuous to most people. But, due to modern technology, the hidden lives of these owls can now be viewed without causing any disturbance to them!
The interesting, seldom viewed behaviors of these owls can be viewed through several cameras that have been set up in nesting boxes.
At this site, the pair of owls are in the mating stage and have not yet laid any eggs:
BarnOwls Italy,Texas
At this site, the pair have 7 eggs that are just in the hatching stage; so far two of the seven eggs have hatched. The streaming video has sound so you will hear a lot of crying hatchlings!
BarnOwls Benecia, California
Young owls fledge the nest at 8-10 weeks old, so there is plenty of time to watch these chicks grow!
References:
Marti, C. D., A. F. Poole and L. R. Bevier (2005). Barn Owl (Tyto alba). The Birds of
Wednesday, April 4, 2007
Brown-headed Nuthatch
Here is some edited video footage I captured of the male bringing the female food and the last part is the female taking a look outside of their nesting cavity.
Sunday, April 1, 2007
April 1st Bird Count
Here is this list. I have indicated if the bird is a year round resident, winter resident, summer resident, or a migrant just passing through. I have also indicated the conservation status of each species.
Eastern Towhee (Pipilo erythrophthalmus)
Year Round Resident, Populations declining throughout range
Brown-headed Cowbird (Molothrus ater)
Year Round Resident, It is a common bird across most of North America, but numbers are declining in most areas
Red-shouldered Hawk (Buteo lineatus)
Year Round Resident, Populations appear stable, but may be declining in some areas
Year Round Resident, Increasing across most of range
Northern Mockingbird (Mimus polyglottos)
Year Round Resident, Common and widespread
Northern Cardinal (Cardinalis cardinalis)
Year Round Resident, Population density and range increasing
Year Round Resident, Populations increasing and expanding range northward
Eastern Phoebe (Sayornis phoebe)
Year Round Resident, Populations stable
Year Round Resident, Populations stable or increasing
Carolina
Year Round Resident, Slight, but significant population decreases across range
Brown-headed Nuthatch (Sitta pusilla)
Year Round Resident, Decreasing because of habitat degradation
Brown Thrasher (Toxostoma rufum)
Year Round Resident, Populations declining slowly throughout range
Blue Jay (Cyanocitta cristata)
Year Round Resident, There is a slight but significant decline in Blue Jay numbers across the
House Finch (Cyanocitta cristata)
Year Round Resident, Common and benefiting from human development
American Robin (Turdus migratorius)
Year Round Resident, Populations stable or increasing throughout its range
Great Blue Heron (Ardea herodias)
Year Round Resident, Populations are stable
Mourning Dove (Zenaida macroura)
Year Round Resident, Widespread and abundant
American Crow (Corvus brachyrhynchos)
Year Round Resident, Populations slightly, but significantly increasing
American Goldfinch (Carduelis tristis)
Year Round Resident, Abundant and widespread
White-throated Sparrow (Zonotrichia albicollis)
Winter Resident, Declining over much of breeding range
Yellow-rumped Warbler (Dendroica coronata)
Winter Resident, Populations stable or increasing in most areas
Hooded Warbler (Wilsonia citrina)
Summer (Breeding) Resident, Common and increasing in some areas
Chipping Sparrow (Spizella passerina)
Summer (Breeding) Resident, Populations appear healthy
House Wren (Troglodytes aedon)
Summer (Breeding) Resident, Populations have increased over the long- and short-term across the continent
Summer (Breeding) Resident, Has disappeared from some small forest areas, but is increasing slightly rangewide
For more information on point counts, visit the Point Count Database: www.pwrc.usgs.gov/point/
References:
http://www.birds.cornell.edu/AllAboutBirds/BirdGuide