NAMC 2011 - Dearborn portion

Saturday, May 14 was the North American Migration Count. My husband Darrin O'Brien coordinates the count for Wayne County, and as usual we covered the UM-Dearborn campus, as well as some other spots in Dearborn. It was a pretty lousy day weather-wise, and many of the migrants that we enjoyed last week had moved on. Although we were only able to thoroughly cover campus and one of the Ford fields (with quick peeks at a few other locations) we still managed to have a pretty good day. On campus we tallied 83 species, including 19 species of warblers. None of the warblers were recorded in numbers over 10 individuals, but we had great looks at Mourning Warblers which is always a treat. Most of the warblers were feeding rather high in oak trees, typical of mid-migration as they are among the last trees to leaf out. Other highlights included a flyover Broad-winged Hawk, and the first Gray-cheeked Thrush of the season. We spent more time than we budgeted at the Ford field in the southeast corner of Hubbard and Southfield. We ended up with 48 species there, including 13 warblers species feeding in the oaks along the margins. This field, along with several others, has been planted in a cover crop of clover. While the Bobolinks present there earlier this month have moved on, there were many Savannah Sparrows on territory or with nests, along with Ring-necked Pheasant, Eastern Towhee, and some lingering White-crowned Sparrows. One of the better birds of the day was a calling Eastern Meadowlark in field #8. This is no longer an easy bird to find in Dearborn. Please note that these fields are now posted "no trespassing" so should only be viewed from public roads. RRBO has permission from Ford security to survey them. One last surprise was a big roost of Double-crested Cormorants (above) at Fordson Island. Between the birds perched on the dead tree and the ones flying around the Ford Rouge Plant, we counted 102. Back at home in east Dearborn, we had one of the Pine Siskins nesting in the neighborhood. Unfortunately, we did not have the time to walk along the Rouge River channel, or hit a couple of other birdy spots. Overall, we had 98 species (23 warbler species) in Dearborn for the day.

Spring migration update

Spring migration has been terrific the last week, so I hope everyone has had a chance to get out and see some birds. I thought I would provide a more detailed update here.

The chart below shows the number of species seen on campus each day since 2 May (the yellow line) as well as the number of warblers species (the blue bars). Click to enlarge.

The best day of the season was 10 May, with 95 species recorded, 25 of which were warblers. For some perspective, there are 37 species of warblers that occur regularly in Michigan (4 more are considered accidental; we have recorded all but 2 of the 41 species in Dearborn in the last 40 years). Some of the warbler highlights were a Kentucky Warbler on 10 May, our first record since 2006 of this southern species, and a female Prothonotary Warbler, which was present from 9-11 May. A gorgeous Golden-winged Warbler was also seen from 10-12 May. Closely related Blue-winged Warblers have also been present, while on 8-9 May, a hybrid of the two, a "Brewster's" Warbler, was observed; it sang a Blue-winged song. The total number of warbler species for 2011 so far is 28.

Other bird highlights of this period include a Summer Tanager and an Osprey on 10 May; a fairly early Olive-sided Flycatcher on 12 May, and two Red-headed Woodpeckers on 13 May.

We have recorded 133 species on campus so far in 2011. The total for Dearborn for the year is 151. This includes two records of Clay-colored Sparrow. One was this bird, photographed by Cathy Carroll along the Rouge River near the TPC of Michigan on 10 May.

Another was singing at the fallow sunflower field at the south side of Hubbard at Southfield. That location also hosted up to 10 male Bobolinks from 6-8 May.

I think migration has been terrific due to a combination of things. First, we did not get the very early warm spells that we have had the last couple of years, so trees and shrubs did not leaf out early. This has made viewing conditions quite excellent. Cool mornings have concentrated birds in sunny spots in the morning, and also resulted in many insects being most abundant near the water's edge (on campus, along Fairlane Lake). Thus, birds have been easier to find. Some credit has to be given to the luck of weather patterns, which are always the wild card. Finally, I think we are recovering from population losses that were due to the dramatic cold spell in the eastern U.S. in spring 2007.

There is a lull right now, but I expect we will get one more good wave of migrants before the end of the month. Viewing conditions will be more challenging now that foliage is thicker, but do your best to get out and enjoy!

Update on the Ross's Goose

In my last post, I described the discovery of a Ross's Goose on 24 March 2011, a first record for Dearborn. The goose was banded, and we have just received the details from the Bird Banding Lab.

This was a nestling male banded on 7 August 2006 in Nunavut. This much I knew from reporting the goose on the Bird Banding Lab's web site. The location, it turns out, is McTavish Point. The geocoordinates are 67.75, -101.08333, which places it north of the Arctic Circle in the Queen Maud gulf region, where over 90% of the world's Ross's Geese nest.

This map (click to enlarge) shows the banding location with a red marker: this is 1900 miles in a straight line from Dearborn. I've also indicated the location of Akimiski Island in James Bay, Nunavut. Although we do not see many Canada Geese with orange neck collars around here any longer, this is where nearly all of them were banded.

Ross's Geese have undergone a substantial population increase in the last few decades, and while once exceedingly rare in the Midwest and eastern U.S. during migration and winter, they have been showing up in these regions with increasing frequency. The increase in Arctic-breeding geese (especially Snow Geese) has profound impacts on sensitive habitats. "Our" Ross's Goose was banded by Ray Alisauskas, a scientist with the Canadian Wildlife Service, one of the key researchers working on the status of Ross's Goose and Snow Goose and their impacts on Arctic ecosystems. (Thus answering the obvious question of who would be in such a remote place banding geese!)

Most of the specific information on the winter or migratory distribution of Ross's Geese based on band recoveries is from hunters. Presumably, a report like ours, from a live bird, is quite rare.

While not the flashiest bird, this Ross's Goose surely had one of the most interesting stories of any bird we have encountered!

New for Dearborn: Ross's Goose

In the late afternoon of 24 March, Jim Fowler, Jr. found an adult Ross's Goose on private property, a first record for Dearborn. Several of us were able to see the bird and get some photos, and were hopeful the bird would be present in a more accessible area the next day. Searches all over the city turned up empty, however.

The goose was in the company of three Canada Geese, and was approximately the size of a Mallard, perhaps slightly larger. In Mike O'Leary's first photo, the bird is relaxed and shows the short-necked appearance of a Ross's Goose (it later got a little wary and raised its head a lot). The feathering between the bill and face was very straight, and the base of the bill had the characteristic blue-gray color and the some of the warty bumps of a Ross's Goose. (These warts are most pronounced on older males, least on females.)

Looking at the bird with binoculars, no grin patch was readily apparent; in the close-ups of Cathy Carroll's photos below, a thin dark line is present. This seems to be within the range of an "acceptable" Ross's Goose. The forehead didn't appear as "steep" as some Ross's Goose photos I have seen, but is also within the range for Ross's. It was obviously not a Snow Goose, but many of these geese have been judged to be hybrids.

We all appreciated (and enjoyed!) Cathy's belly-crawl up to the goose for a few closer photos.


The last two are the same photo; I increased the contrast of the second photo.

Those of us who saw this goose feel pretty comfortable calling it a Ross's Goose, and not a hybrid with a Snow Goose. According to the Birds of North America account for Ross's Goose, the percentage of hybrid Ross's x Lesser Snow Goose was 1.9% between 1989 and 1992 (n=2,943 Ross’ Geese captured) during banding operations in central Canadian Arctic. This was down from 4.7% for the period between 1962 and 1968 (n=29,880). It sure seems like many more birds are called hybrids than are likely to be actually present in the population. Perhaps this speaks to our lack of ability to truly distinguish the species of some intermediate-looking birds.

A final clue is available that may corroborate the identity of this goose. It had a band on its left leg. We have several photos that show most of the numbers, and I have a call into the Bird Banding Lab to the person in charge of looking up partial band numbers.

UPDATE: We have confirmed that this is indeed a Ross's Goose, banded in Nunavut on 7 August 2006, a male of unknown age.

This is the 257th species for Dearborn. There are fewer than 6 records of Ross's Goose for Wayne County.

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Thanks to Joe Hildreth for his comment below noting that a banded Ross's Goose was seen in Bowling Green, OH from 13-19 March. The pitch of the forehead, feathering near the bill, and bill structure look strikingly similar to the Dearborn bird. There is a link in the comment to a couple of photos.

More shade coffee birds and banding: part 2

In my last post I outlined the first portion of my recent trip to Nicaragua. Here is the next installment.

Part 2: Finca El Jaguar

In 2009, during our brief stopover in Managua, Nicaragua, my husband and I met Georges and Liliana Duriaux-Chavarría, the owners of El Jaguar, a fantastic cloud forest reserve and coffee farm near Jinotega in the north-central highlands of Nicaragua. We were immediately taken by both their charm and their dedication to bird conservation. There was no question we would visit them on our next trip to Nicaragua.

El Jaguar consists of about 240 acres, of which 80% is protected cloud forest reserve. This is beautiful old-growth forest with towering trees and thick multi-story growth.

Around 50 acres is coffee (in the foreground above, forest beyond). The coffee areas are broken up into plots separated or connected by forest or natural habitat patches. The coffee itself is grown among banana and other trees, but is not considered heavily shaded. This is because at an elevation of 4300 feet, the farm is covered by misty clouds part of nearly every day. The clouds provide the "shade" and the coffee would suffer from not enough light and a variety of fungal diseases if there were lots of trees planted with the coffee. So while El Jaguar does not qualify for Smithsonian Bird-Friendly certification, they are Rainforest Alliance certified.

Over 270 bird species have been recorded at El Jaguar (we saw about 80 in our few days there). More than 50 are Neotropical migrants (those that primarily breed in the U.S. and Canada and winter in the tropics). This includes an amazing 27 species of "our" warblers -- Golden-winged Warbler, the endangered Golden-cheeked Warbler, and the Cerulean Warbler among them. Due to this rich bird life, El Jaguar was designated as an Important Bird Area by BirdLife International in 2006.

Two winter bird banding stations are run by Georges and Lili at El Jaguar, one in the primary forest, one in the coffee area. Since 2009, El Jaguar has also collaborated with the Golden-winged Warbler Working Group to do regional surveys for this declining North American-breeding warbler. A similar project, the International Wood Thrush Conservation Alliance, is now being launched to benefit the Wood Thrush, and El Jaguar participated in the first workshop.

Wood Thrushes are one of the most common North American-breeding migrants found wintering at El Jaguar. Here is one captured in the nets at the coffee banding station. As part of the working group project, a unique combination of color bands is put on each Wood Thrush so that individuals can be identified without having to recapture them.

This species has declined an estimated 50% over its broad breeding range since the late 1970s. It is evident to us, having traveled in the Neotropics, that Wood Thrushes require mature forests in the winter. The remarkable forests at El Jaguar by far had the most Wood Thrushes we've seen in our travels. The banding program at El Jaguar (and Finca Esperanza Verde) has shown that individual Wood Thrushes return to the same places each winter. Further studies with new technology indicate that there is strong connectivity between particular nesting regions and specific wintering regions. Since RRBO has a history of working with Wood Thrushes, we are anxious to get involved in this conservation effort seeking to understand the linkages with breeding and wintering areas, and factors important to their survival.

If all that work isn't enough, in 2010, Georges and Lili received a Neotropical Migratory Bird Conservation Act grant, through the US Fish and Wildlife Service and matched by the American Bird Conservancy. This grant will assist El Jaguar in reforesting neighboring farms and help community coffee farmers work towards certifying their coffee with Rainforest Alliance. The photo above shows the native tree nursery that is part of this project. Within the next few years, El Jaguar will have raised and distributed over 20,000 trees!

Wilson's Warblers are also amazingly common there. We see them in most coffee farms we visit, and they are one of the few North American migrants that will actually feed in the coffee trees themselves.

Of course, we always like seeing the tropical resident birds. Georges and Lili are now starting a program where they will band throughout the year in order to gather the same type of important survivorship data on resident species.

As always, I like seeing the tropical cousins of the thrushes that I study here at RRBO. Here is an Orange-billed Nightingale-thrush (Catharus aurantiirostris) getting measured.

Quail-doves are notoriously hard to see. This White-faced Quail-dove (Geotrygon albifacies) was captured in the forest nets. Due to the efforts of Georges and Lili, and their son Jean-Yves, to educate the surrounding community, elusive forest birds that are typically scarce because they are hunted are much more common and relatively easy to see at El Jaguar. On the short trail behind our cabin, we saw Violaceous and White-faced Quail-doves (Geotrygon albifacies), and had drop-dead looks at a strolling Little Tinamou (Crypturellus soui) and Highland Guans (Penelopina nigra).

In fact, the guans actually come to feed with the chickens! So do a few Gray-necked Wood-rails (Aramides cajanea).

We didn't do as much hands-on banding at El Jaguar as at Finca Esperanza Verde. They use a different protocol at El Jaguar, and while I am familiar with all the extra measurements they take, the young Nicaraguans who help Georges and Lili could process birds way faster.

Hopefully, I came in handy interpreting the banding and conservation projects to this group that came for a visit.

In trying to make ourselves useful, we also spent time working on putting together a dragonfly list for the property.

We only brought one net, so Darrin did all the catch-and-release. I just posed with the net, but did a lot of ID work.

We were able to find and identify over a dozen species, including this very gorgeous Rhionaeschna jalapensis.

We also photographed and identified over two dozen butterfly species, many of which were new for the El Jaguar list.

We took perhaps eight photos of clearwinged butterflies, which turned out to represent seven different species and several families! This is Greta morgane oto.

We are still working on compiling our lists for Georges and Lili (and then could use a vacation from our vacation). It was a productive trip, and if anybody is interested in the logistics of travel to Nicaragua or El Jaguar, feel free to drop me a line. Here are a few links that may be of interest as well:

• The El Jaguar web site
• My more coffee-centric post at Coffee & Conservation, with more photos!
• An interview with Georges via Rainforest Alliance
• A review of El Jaguar coffee from a couple of years ago at Coffee & Conservation (the new crop will be available this spring at Whole Foods as part of one of their blends; I'll keep everyone posted)

Thank you Georges, Lili, and Jean-Yves!