Native Bees Emerging

Native bees, vitally important pollinators, are emerging from their ground nests now. Rod Simmons, Natural Resources Specialist/Plant Ecologist for Alexandria, circulated this photo of a large aggregation of nests Alexandria. See below for Rod's discussion of this site. You can provide nesting habitat for these harmless bees by maintaining a patch of bare earth in your yard.

Steep bank of loamy Potomac Formation “Golden Sand” (Tony Fleming, geologist) extensively colonized by hundreds of Solitary Bees.  Site is southwest-facing corner of Immanuel Lutheran Church and School at corner of Belleaire Road and Russell Road in the City of Alexandria, Virginia.  “[Solitary Bee]…stings are unable to penetrate human flesh and they do excellent pollination work on early fruit... Unfortunately, some members of the public still think that they are dangerous pests - so if beekeepers get a call to ‘deal with’ swarms of bees living in holes in the ground, this is a great opportunity to do a little education.” (http://www.kilty.demon.co.uk/beekeeping/solitarybees.htm).  More information at: www.earthlife.net/insects/solbees.html  And of course our local experts Alonso Abugattas, LB Nature Center Director; Cliff Fairweather, Environmental Education Director and Naturalist at Audubon Society; John Walsh, City of Alexandria Horticulturist; Mark Kelly, Ford Nature Center Director; Sam Droege at USDA; and others.  Photo by R.H. Simmons, March 22, 2011.

Cat and Birds

A new study on the impact of free-roaming house cats on bird populations has been released and a recent NY Times article describes the findings:

http://www.nytimes.com/2011/03/21/science/21birds.html?_r=2&src=me&ref=homepage

This is just one more in a long line of studies demonstrating the enormous impact free-roaming house cats have on birds. Some argue that the impact of house cats on bird populations pales in comparison to habitat loss and degradation as a risk factor for native bird populations, but free-roaming and feral cats are actually part of the impact of habitat loss and degradation due to expanding residential development. House cats can actually extend the habitat impact of residential development because they often hunt in adjacent remnant patches of natural habitat, such as woodlots and local parks. They also diminish the efforts of nearby homeowners trying to restore some of the lost habitat for birds on their properties through Audubon at Home and similar programs. Even if these cats stay close to home, they prey on birds and other wildlife that enter their owner's properties.

House cats are subsidized predators that don't face the same constraints nature places on wild predators. We take care of most of their needs, while wild predators must budget their energy between hunting, finding mates, caring for young, defending territory, avoiding predators, overcoming illness and other activities. Cats have the extra energy to indulge in "leisure hunting", while wild predators have to focus on capturing just enough prey for themselves and their young. Also, wild predator numbers in a given area are limited by factors such as the available prey, competition with other predators, availability of suitable habitat, and mortality from animals that prey on them. Because we take care of them, house cat populations can occur in far higher concentrations than is possible for wild predators.

If you have a cat that simply cannot tolerate being kept inside full-time, try keeping it inside until after breakfast and making sure that it is back in the house before dinner. This keeps it indoors during the twilight hours, when birds and other wildlife are most vulnerable to predation. Cat owners should also be aware that there is a new dog in town that poses a mortal danger to their pets -- the eastern coyote. Coyotes are now well-established in Northern Virginia and they tend to eliminate medium-sized predators, including house cats, that compete with them for prey.

Free-roaming house cats aren't the only risk to birds posed by humans and our activities, but, as the study in the NY Times article makes clear, they are a significant one. Conservative estimates of the annual toll on birds in the U.S. are 100-150 million and higher estimates go to 1 billion. Untold numbers of small mammals, reptiles and amphibians are lost as well. Ultimately, it is the cumulative impact of many factors -- cat predation, habitat loss and fragmentation, pesticides, building lights, climate change, among others, often operating in concert, that put bird populations at risk. We need to address all of these, but cat predation is one on which every cat owner can have an immediate impact .

Saving a Nearly Extinct California Native Plant

Here's an interesting video of the resurrection of a nearly extinct native plant in the San Francisco area of California.  http://video.pbs.org/video/1841603655

Native Plants in the Landscape

This looks like a great conference on using native plants. It's in Millersburg, PA, which is not to far from our area.

www.millersvillenativeplants.org

Native Plant Sales in Northern Virginia -- Updated and Expanded List

We've added some new native plant sales to the list

  

Northern Virginia Soil and Water Conservation District Annual Seedling Sale 

In Progress Now

 Two packages are available:

 The Deer Resistant Shrub and Small Tree package is offered for $15.95 and includes two each of the following species:  Red osier dogwood, Silky dogwood, Serviceberry, Spicebush, and Pawpaw. 

 The Wildlife Friendly Tree Package sells for $10.95 and is ideal for common areas or larger suburban yards.  The tree package includes two each of the following: Black oak, Sycamore, and American hornbeam.   

**All seedlings are native to Northern Virginia**

 To download an order form, please visit our website at: http://www.fairfaxcounty.gov/nvswcd/orderform_2011.pdf

 For pictures of the mature species offered in the packages please visit our website at:http://www.fairfaxcounty.gov/nvswcd/seedlingsale.htm

 If you have any questions, please feel free to contact Nick Kokales by phone at (703) 324-1420 or by e-mail at nicholas.kokales@fairfaxcounty.gov.   

US National Arboretum Lahr Symposium and Native Plant Sale

Sat., March, 26th. The Visitor Center @ USNA is undergoing a major remodeling so this year the sale and syposium is being held at the Beltsville Agricultural Research Center in MD. The plant sale usually has 6 or so vendors and is open to the general public (not just symposium attendees, although attendees have an hour or so of shopping before the general public).

http://www.usna.usda.gov/Education/events.html

Green Spring Gardens Garden Markets

9am-1pm Saturdays April 2nd and April 9^th

VA Native Plant Society will have a booth behind the Horticulture Center during the sale and sells only natives -- discounts to VNSP members.

http://www.fairfaxcounty.gov/parks/gsgp/events.htm

Rust Nature Sanctuary

April 9, 2011 from 10am to 5pm

Featuring:

Nature by Design

 www.nature-by-design.com

Hill House Farm & Nursery

hillhousefarmandnativenursery@yahoo.com

For more information contact: Ann Garvey at 703-669-0000 ext5

Rust Nature Sanctuary,

802 Childrens Center Rd., Leesburg, Virginia 20175.

Huntley Meadows Eco-Savvy Expo

April 10   -   Noon-4pm

Huntley Meadows Park

3701 Lockheed Blvd

Alexandria, VA

703-768-2525

Native Plant Sale by Nature by Design, Bee Boxes, Rain Barrels, Native Seed Mixes and How-to Presentation

Parkfairfax Native Plant Sale

Saturday, April 30, 2011, 9:00-2:00

3601 Valley Drive, Alexandria, Virginia 22302.

15-20 vendors. There is also a sale in the fall.

Earth Sangha 
www.earthsangha.org 
(703) 764-4830 

Sunday, May 15^th, 10 am to 3 pm

Spring Plant Sale event at their Wild Plant Nursery in Springfield -- see the website for location. In partnership with Arlington Regional Master Naturalists

Native Plant Sales in Northern Virginia

Native plant sales are popping up all over! Here's a listing of some upcoming ones in or near Northern Virginia:

US National Arboretum Lahr Symposium and Native Plant Sale

Sat., March, 26th. The Visitor Center @ USNA is undergoing a major remodeling so this year the sale and syposium is being held at the Beltsville Agricultural Research Center in MD. The plant sale usually has 6 or so vendors and is open to the general public (not just symposium attendees, although attendees have an hour or so of shopping before the general public).

http://www.usna.usda.gov/Education/events.html

Green Spring Gardens Garden Markets

9am-1pm Saturdays April 2nd and April 9^th

Local growers provide you with shrubs, native plants and wildflowers, ornamental grasses and unusual perennials and annuals. Friends of Green Spring (FROGS) receive 10% off in the Garden Gate Plant Shop. The Green Spring Master Gardeners available at each Garden Market. Plant shopping and free gardening information and freshly brewed coffee – what a great way to spend a Saturday morning!

http://www.fairfaxcounty.gov/parks/gsgp/events.htm

Rust Nature Sanctuary

April 9, 2011 from 10am to 5pm

Featuring:

Nature by Design

 www.nature-by-design.com

Hill House Farm & Nursery

hillhousefarmandnativenursery@yahoo.com

For more information contact: Ann Garvey at 703-669-0000 ext5

Rust Nature Sanctuary,

802 Childrens Center Rd., Leesburg, Virginia 20175.

Huntley Meadows Eco-Savvy Expo

April 10   -   Noon-4pm

Native Plant Sale by Nature by Design, Bee Boxes, Rain Barrels, Native Seed Mixes and How-to Presentation

Huntley Meadows Park

3701 Lockheed Blvd

Alexandria, VA

703-768-2525

Northern Virginia Soil and Water Conservation District Annual Seedling Sale 

 Two packages are available:

 The Deer Resistant Shrub and Small Tree package is offered for $15.95 and includes two each of the following species:  Red osier dogwood, Silky dogwood, Serviceberry, Spicebush, and Pawpaw. 

 The Wildlife Friendly Tree Package sells for $10.95 and is ideal for common areas or larger suburban yards.  The tree package includes two each of the following: Black oak, Sycamore, and American hornbeam.   

**All seedlings are native to Northern Virginia**

 To download an order form, please visit our website at: http://www.fairfaxcounty.gov/nvswcd/orderform_2011.pdf

 For pictures of the mature species offered in the packages please visit our website at:http://www.fairfaxcounty.gov/nvswcd/seedlingsale.htm

 If you have any questions, please feel free to contact Nick Kokales by phone at (703) 324-1420 or by e-mail at nicholas.kokales@fairfaxcounty.gov. 

It's Amphibian Time!

Wood frog pair mating; note eggs released by female.

Late winter and early spring are prime times for amphibian breeding. Wood frogs, spotted salamanders, Jefferson salamanders, spring peepers, toads, pickerel frogs and other amphibians are now mating in temporary wetlands called vernal pools and similar habitats around Northern Virginia. If you have a small pond on your property and are near sources of amphibian, you might attract some of these critters to use it for mating and egg laying. If you want amphibians, though, you can't have fish because the fish will eat amphibian eggs and larvae.

Spotted salamander.