The Hawks are Moving

It is now October and our birds (all but one) are out of the States and moving through Central America. Ridgena, the bird from Hawk Mountain, is the furthest south, with her current location near Kankintu, Panama. Following Ridgena is Sadie, who is in Honduras, and closely behind Sadie are Pocono Penny and Rachel Carson in Chiapas, Mexico. 

From our tracking data we have been able to compare dates between the 2015 birds: 

Bird ID	Depart Nesting Area	Begin Migration	Out of PA	South of TX	Passing over Veracruz, MX
Ridgena	22- Aug to 24- Aug	24-Aug	26-Aug	23-Sep to 26-Sep	26-Sep to 27-Sep
Pocono Penny	9-Jul to 12- Jul	-	3-Sep to 19-Sep	28-Sep	30-Sep to 2-Oct
Rachel Carson	-	-	18-Sep	27-Sep	28-Sep to 2-Oct
Sadie	30- Jul to 3- Aug	8-Aug	18-Aug	24-Sep to 27-Sep	29-Sep to 1-Oct

   

Unfortunately, we lost signal for Rachel Carson and Pocono Penny for a short time, not allowing us to determine their departure from their breeding grounds or when they started moving south. What is interesting is that even though they were out of Pennsylvania at different dates they all managed to pass over Veracruz, Mexico within a seven day period.

We are also very happy to inform you that on September 18th we were able to put out the fifth unit for 2015 (nine total for 2014 & 2015) on a juvenile Broadwing. Rebecca was spending time at the local banding station with the hopes of trapping one or two birds migrating through. On the 18th, the juvenile, weighing over 400 grams received a unit! What makes this bird exciting is that we have no idea where it came from. We are crossing our fingers that Chenango has a safe fall migration and a successful return migration in the spring. 

Thank you to Phil Campbell and Pablo Santonja for capturing this exciting moment!

If you would like to track our tagged juvenile, Chenango, along with the other four birds, visit the Hawk Mountain Broadwing Tracking page.

It's Time to Head South

   August 15th marked the start of the fall migration count at Hawk Mountain. As of August 28th, 121 Broadwings have passed over North Lookout. The month of September will be an exciting time for us as it is peak migration for Broadwings heading south. We anxiously await a good flight day in mid-September, hoping to witness a large kettle of Broadwings overhead, possibly with one of the telemetered birds. When we are not spending time at the lookout, we will be conducting data analyses from the past two field seasons as well as dedicating days to trapping Broadwings at the Little Gap banding station. We hope to  affix an additional two to four transmitters on migrating birds this September, putting the total transmitters deployed in this study to 10 or 12.
   If you have not already checked out our movement maps on Hawk Mountain's website, click the link to get daily movements of the newly tagged birds from 2015. Sadie, adult female from Silver Lake (Delaware State Forest) and Ridgena, adult female from Game Lands 106 (Hawk Mountain) have both left Pennsylvania. We anticipate Pocono Penny, adult female from Stoney Acres (Delaware State Forest) and Rachel Carson, adult female from Mud Pond (Delaware State Forest) will start moving south within the next two weeks.

   We are interested to see the comparisons and differences between the birds from 2014 and 2015. Dates of departure, arrival, migration pathway, stopover and roost sites will all be examined and compared with data from 2014. From the data thus far, we can see that Ridgena, Sadie and Abbo have all traveled through the large, contiguous forest along the Appalachian Mountain chain in West Virginia and Virginia.

Table 1. Dates each of the 2014 tagged birds departed their nesting grounds, started migration, left Pennsylvania and were south of Texas.

Bird ID	Depart Nesting Area	Begin Migration	Out of PA	South of TX
Abbo	18- Jul to 23- Jul	29-Aug	3-Sep	30-Sep
Kit	17-Aug to 19 -Aug	27-Aug	29-Aug	-
America	15- Aug to 17- Aug	28-Aug	1-Sep	1-Oct
Hawkeye	8- Aug to 12-Aug	27-Aug	8-Sep	28-Sep

-          Kit stopped transmitting on 18 September 2014, near New River, south of Hinton, West Virginia.

-          America stopped transmitting on 22 November 2014, northeast of Kankintu, Panama.

-          Hawkeye stopped transmitting on 9 November 2014, in Reserva de la Biosfera La Sepultura, Chiapas, Mexico.

   We suspect America and Hawkeye may have wintered in these locations, though we cannot be certain without further signals. Be sure to check our Facebook page regularly for photos and video links from the summer and updates on our trapping of fall migrants and the latest locations of our migrating Broadwings. We are excited to dive into the data and see what the birds were eating this summer and how that compares to last summer and to analyze habitat use and many other features. Wherever you are Broad-winged Hawks may be passing overhead, so enjoy the migration and check our maps to see if the tagged birds are passing near your home!

Last Day of the Field Season

Yesterday marked the last day of the 2015 field season. We ended at the Common Room nest site at Hawk Mountain with an afternoon downpour while on the slope of the ridge.
Soaking wet and tired we finished up our last veg plot.

Within the last two weeks we have done vegetation sampling at 12 nest sites.
Each nest site has 6 plots (nest site circle and 5 randoms), so all in all we did a total of 72 plots. At each plot we are measuring the nest tree characteristics, canopy and ground cover, shrub density, the diameter breast height (DBH) and species of each tree. A few of the abundant tree species we have seen at many of the sites include, Black Birch (Betula lenta), Red Maple (Acer rubrum), Chestnut Oak (Quercus prinus), Red Oak (Quercus rubra), and Blackgum (Nyssa sylvatica). 

We are so thankful for the amazing group of people who helped us complete this task. A big thank you to our field assistants, Zach, Corinne, Randy and Cassie and of course our fabulous volunteers Laura, Heather, Holly, Rob, Kara, Marc and Terry. It was hot, humid, there were ticks and mosquitoes  and thick patches of briers, mountain laurel and rhododendron, but we did it!
Thank you all again!

Laurie, Zach and Corinne working on a plot at Stoney Acres

Veg surveys at Mud Pond in the Delaware State Forest 

Dr. Terry Master and Dr. Laurie Goodrich identifying trees

Last plot at Mud Pond before moving down the road to the Silver Lake nest

Corinne recording data for Laurie (who is somewhere in all that Mountain Laurel)

We found her!

Corinne and Laurie at the Game Lands 106 site

Zach using his ocular tube to determine ground cover while Marc records

Everyone hard at work at the Coal Mountain site

Zach walking the transect while measuring canopy cover

~ ~ ~ ~ ~
We are also happy to inform you that the movement map with the tagged birds is up on the Hawk Mountain webpage for your viewing pleasure.  Check out
 http://www.hawkmountain.org/birdtracker/ 
to follow the birds in 2015 as they leave their breeding grounds and head south in the fall.
You can zoom in to see where the birds are at currently, and compare movements between those from the same area (Delaware State Forest), those from different forest types (Hawk Mountain and Delaware State Forest) and compare this years movements with the migration pathway from last years tagged bird, Abbo.

Abbo's nest, Observations and Trapping

   Our last blog post delivered some unfortunate news about our tagged bird, Abbo. Since then we have not received any new locations leading us to conclude that the bird attacked at the nest site was Abbo. With the hope of finding more clues or the satellite telemetry unit that belonged to Abbo, a team of staff and volunteers went out to the New Ringgold nest site on June 17th to search around the nest tree and surrounding area for any sign of her or her transmitter. We did not find much other than a few more feathers from an adult broadwing. One week later, Rebecca, Laurie and Todd (HMS facilities) traveled back to Abbo's nest to climb the nest tree to see whether or not the satellite transmitter was sitting in the nest or perhaps find evidence of what happened.  Abbo and her mate were incubating eggs at the time of the event, so we might even find their remains.

Rebecca prepping as Todd checks out the nest tree

Rebecca heading up the tree

Halfway there; note how much defoliation had occurred leaving the nest exposed.

A few branches to get around before reaching the nest

Descending after looking in the nest and snapping a few pictures

mission complete

Center of the nest. Apologies for the blurry pictures, you are just a little shaky when you reach the top

Nest from above

After climbing to the nest, some 70+ feet off the ground, and no transmitter in sight, we are saddened to say that Abbo and the transmitter have not been seen since. No eggs were found in the nest or any evidence of what might have happened except a few feathers. Eggs could have been taken that day or another day by a passing crow, so their disappearance was expected.




   Field observations on the other 11 nests will be coming to an end in the next two weeks. Many of the nests in the Delaware State Forest have young that will be fledging soon. Each of the nests have at least a morning and afternoon observation conducted every week. Our field assistants and dedicated volunteers have been collecting great data and having fun seeing the chicks grow! 

Corinne observing at the Saw Creek nest in the Delaware State Forest

   The nestcam in Shartlesville has been recording since the installation from 6 am to 7 pm everyday. We are getting a lot of great footage, all of which are up on 
The Broad-winged Hawk Project Facebook Page and Hawk Mountain Sanctuary's YouTube Page.

   In other project news, we began trapping Broadwings on June 22nd, starting in the Delaware State Forest. We had a successful first day, with our first bird trapped being a female, and large enough to have a transmitter attached!

Rebecca and Laurie banding the female

Meet Pocono Penny!

Fitting the backpack

Randy and Pocono Penny

Rebecca and David putting on the transmitter

Once the bird is banded and the unit is attached we always take a few pictures of the wing, tail feathers, head, etc.

Ready for release

 As of July 1st, we have a total of three transmitters on female Broadwings. Two of which are in the Delaware State Forest and the third at Hawk Mountain. We have also trapped three males, who each received color bands and a USGS aluminum band.

Color code: Black-Black. Male from Saw Creek in the Delaware State Forest

We will continue trapping the next two weeks, with the hopes of putting on five more units. Once observations and trapping are finished we will move on to vegetation sampling at all of the nest sites. It has been a hectic couple of months but we are happy to share all of our success with all of you!