Ten years counting migrant raptors!

Today was the closure of this season's hawk count over the Ancon Hill in Panama City.  This was a record year, including the largest number of diurnal raptors counted in one day: 2,105,060 bird in November 2nd!

Turkey Vultures

Turkey Vultures and Swainson's Hawk

For ten years now, the Panama Audubon Society (PAS) has organized these counts with the intention to monitor the migration of these species throughout the region.  Panama City is right under the path of these migrating kettles, so every year we marvel at this magnificent spectacle that nature gives us.  Many species of diurnal raptors migrate through Panama, but the most conspicuous are the Turkey Vultures and both Swainson's and Broad-winged Hawks.

Swainson's Hawk (adult, pale phase)

Swainson's Hawk (immature, dark phase)

Broad-winged Hawk

I want to thank the PAS and all the counters and volunteers who every year perform this arduous task. For them, CONGRATULATIONS!

Impressive migration over Panama City!

When I went to my workplace this morning, all my unit in the hospital was closed.  The reason?  Our president decreed a day off due to XXIII Ibero-American Summit of Heads of State and Government... so I went back to my apartment to rest a little.  After a while, I started to noted some movements in the sky... all over, huge kettles of raptors were flying above Panama City, in their annual migration to South America.

The massive amount of birds darkened the sky... not kidding!  Soon, I started to receive text messages and facebook notifications of friends experiencing the same spectacle from different points of the city... this wonder of nature did not go unnoticed, since many of my non-birder friends also texted me!

The above photo only shows a tiny fraction of the Broad-winged Hawks and Turkey Vultures that passed today... there are at least 170 hawks... and this is a cropped picture!  The next picture shows better these two species that, above my apartment, were by far the most abundant.

In other parts (for example, above the Miraflores Locks of the Panama Canal), the predominant species was the Swainson's Hawk.  I only counted some 200 Swainson's Hawks in 55 minutes... compared to some 5000 Broad-winged Hawks and 10,000 Turkey Vultures!

When I see these huge kettles, I always look for other raptors mixed within these flocks.  That's how I picked up these Mississippi Kites.

Or this Osprey.  The long wings, slightly angled in the wrist, are characteristic.  None of these birds breed in Panama, nonetheless they are pretty common in this season.

I also saw four Peregrine Falcons.  They flew VERY high, so there was no way to see if any carry a transmitter or something (yeap, I'm talking about Island Girl).

Don't stop looking at the sky, since the season is not over yet!

Raptors high above

A curious thing about our last trip to the Chiriqui highlands in western Panamá last month was the great number of raptors that we saw up there, most of them migrating.  Starting at the foothills with Barred Forest-Falcons, Yellow-headed Caracaras and Roadside Hawks, the variety was quite good.  Can you id the raptor in the next photo?

Once in the highest part, at El Respingo, above 2550 meters above sea level, we witnessed a spectacle: hundreds of migrant Swainson's and Broad-winged Hawks flying back to North America above our heads.  By far the highest number of Buteos I had ever seen in the highlands.

That's because, usually, the only Buteo we see in the Chiriqui's highlands is the resident race of Red-tailed Hawk.  This bird in particular was far away... so we weren't able to check all the field marks... but considering that migratory races of this species are rare in Panamá, we assume that this one belonged to our residents.

Little before that, we witnessed an uncommon migrant raptor, an adult Sharp-shinned Hawk, fiercely chasing a Wilson's Warbler.  I mention this because when we were trying to decide where to have lunch, I saw a raptor elevating in a thermal just in front of the hotel in Guadalupe.  At first sight, I thought it was an immature Sharp-shinned gaining height... but it was apparent that this bird was larger and bulkier.  I took a couple of shots... look at them and let me know what you think.

All the photos show the typical Accipiter shape, with long tail and relatively short wings... but all my photos show the rounded tip to the tail, a field mark for Cooper's Hawk, a vagrant to Panamá, with only some records.  Anyone agree?

October = Migration !!!

If you live in Panama, or happen that you visits Panama City in october, then watch the skies... you may be missing one of the greatest spectacle this land has to offer!  The southward migration of millions of raptors passing right by the city (enlarge the photo and try to count the dots).

Each year, almost all the populations of Turkey Vultures, Broad-winged Hawks and Swainson's Hawks, fly from their breeding grounds in North America, to their wintering grounds in South America.  In their migration route, the isthmus of Panama is a kind of bottle neck where huge kettles forms, looking like an aerial highway of birds.

This is a diurnal migration, since these birds needs the ascending thermal currents to gain height.  Once at the top of the thermal, they simply glide to the base of the next current and so on.  In this way (gliding), they save a lot of energy during the travel, that can be as long as 14000 miles (22400 km) in the case of the Swainson Hawk.

The three species mentioned above form the bulk of the living mass flying through Panama, but many other species of raptors migrates through Panama too.  Just check at HawkCount.org the number of species and, more important, the number of individuals counted this month only at the Ancon Hill hawkwatch site in Panama City... IMPRESSIVE! 

Sometimes, the number of birds is so high, that the domestic flights in Panama City have been suspended.  Thanks God this plane was flying much higher than the birds in that moment.

So, if you want to see a real river of raptors, come to Panama and enjoy!

No doubt these photos were taken in Panama!

More and more migrants

I went yesterday to the Metropolitan Natural Park of Panama City, taking advantage of the free day. The two previous day have been amazing due to the thousands of hawks and vultures that flew over the city in their way to the south and yesterday the counters at Ancon Hill (that hill with the panamanian flag covered in migrant Turkey Vultures) that the raptors stayed at the forest surrounding the former Canal Area. So, I was expecting to find many raptors in the park waiting for the day to heat-up to re-start the migration. The same did Osvaldo Quintero and Itzel Fong... they also went to the park looking for sleepy raptors. We hardly saw any migrant raptor in our way to El Mirador, but saw many migrant songbirds, specially tons of Swainson's Thrushes and Eastern Wood-Pewees (both were aboundant). At El Mirador, the activity was low... but after a few minutes we started to see some Turkey Vultures, then other group, and then another! In seconds, we saw tons of Turkey Vultures at the thermal currents gaining altitude from all the surrounding forests! Then we saw some Swainson's Hawks too approaching quite close to us, including one individual that flew so close over our heads that I barely captured part of it in the photo. By that time, the whole city was covered in migrat vultures and hawks, literally!!!

We realized that the main route was following the coast, a little distant of us, so we started to walk the way down to the parking lot at the entrance of the trails. We found a big mixed flock after passing the entrance to La Cieneguita trail with many resident species like Lesser and Golden-fronted Greenlets, White-shouldered Tanagers, one Green Shrike-Vireo and some Red-throated Ant-Tanagers; but also including some migrant warblers. The most common was the Bay-breasted Warbler. We found several individuals with variable amount of chestnut on its flanks. I checked them all very well looking for something rarer... but all seemed to be Bay-breasted Warblers in basic plumage. The other pretty common parulid was the Chestnut-sided Warbler. It is amazing how much they change... the alternate and basic-plumaged birds look like different species! However, it is very distinctive even with its winter dress. You can recognize them (even in my photo) by its bright-green crown and back, the complete white eye-ring and its lemon-yellow wingbars. The flock also included a magnificent male Golden-winged Warbler. It was so active, never stopping its quest for insects high on the trees, so I only got blurry photos. It is a shame because that bird is a real jewel. Other warblers at the park, but not in that particular flock, were the Yellow Warblers and the Blackburnian Warblers (both photos are from Costa del Este recently). The Yellow Warbler is one of the most common migrant songbird in Panama, but not in the forest. We also have a resident population, the "Mangrove" Warbler, distinctive different and considered by many as a good species. About the Blackburnians, they become very common in the park (and around the city) for a short period of time... this time I saw only one probable individual briefly while seeing the raptors from El Mirador (this species was pretty common just a couple of weeks ago). Close to the parking lot (at "El Castillo"), I saw a thrush perched quietly at the border of the trail. A quick look with my binoculars confirmed it to be a Gray-cheeked Thrush instead of the aboundant Swainsons'. Both Itzel and Osvaldo asked me: who??, so I showed them the bird, who stayed enough for some photos. It turned out that it was a lifer for both of them! Curiously, that was the second time this season that I see the bird exactly in the same place... so it was not a new year-bird for me, but an exciting lifer (and life photo) for my companions. We then drove to the Visitors Center of the park to have a well-deserved drink... but Osvaldo had a surprise for us. He took us behind the wildlife rehab facilities and in a matter of seconds, a splendid young Common "Mangrove" Black-Hawk appeared to inspect us, probably waiting for us to feed him. Of course we took tons of photos of the cooperative bird, who stayed in the nearby forest when the park's personnel released him. Great way to end the day!

ONE MILLION BIRDS!!!

So, hundreds of thousands birds are not enough? What about ONE MILLION of them? During tonight's Panama Audubon Society (PAS) monthly meeting (and on its facebook page) it was announced that they reached today more than one million migrating raptors for this season... ONLY after 14 days and ONLY over the Ancon Hill in Panama City!!! To be more exact, they reached the amazing count of 1,062,204 birds, most of them Turkey Vultures, Broad-winged and Swainson's Hawks. This is the first time that they reached the one-million mark for a season so quickly. During the meeting, they also presented the educational material that they give for free at the counting sites to anyone interested, like this poster featuring Swainson's Hawks (in spanish, in colaboration with BirdLife International, among other organizations), describing how important is to preserve the habitat that these hawks use during the migration. Congratulations guys!!!

Bright day in Batipa

Batipa is a private reserve in the lowlands of the Chiriqui province (western Panama) that still contains remaining patches of lowland forest. Its include the Cerro Batipa and other two hills, plus a coastline with tall mangrove forest. It is the only reliable site in Panama to find the endangered Yellow-billed Cotinga but it also holds many western Pacific specialties, including a former endemic for Panama. Last sunday, after an excellent day birding the highlands around the town of Boquete, Osvaldo Quintero, Osvaldo Quintero Jr., Rafael Luck, Milagros Sánchez, Olemdo Miró, Gloriela and me decided to visit this reserve, trying to locate the cotinga. We were a little delayed (after descending all the way from Boquete and meeting Mr. Ríos -the reserve owner- for the key of the access gates), so we started birding around 9:00 am. We didn't realized how hot it was in the lowlands until our first stop. After spotting a Laughing Falcon, we all went out of the cars, raising our cameras, noticing that these were completely misted due to the sudden change of temperature. Anyway, I tried to obtain some photos of the falcon... I needed to do a lot of photoshop to fix it! After solving the problem (only waiting a couple of minutes and driving with the windows down with the air conditioners switched off) we stopped a little farther, in a section of road bordered in trees with deep-orange tubular flowers. Soon, we saw five Fiery-billed Aracaris feeding close to a group of Howlers Monkeys. The aracaris moved closer to us allowing some photos, while others birds started to show up. First, an unidentified bird photographed by Olmedo resulted to be an Olivaceous Piculet laboriously working at a few twigs; then, Rafael spotted a hummingbird in the tubular flowers and then another one: a Long-billed Starthroat and a Veraguan Mango. The mango used to be an endemic bird for Panama, but now it is presumably established in Costa Rica's extreme southeastern corner due in part to deforestation. This individual was an immature male because it showed lot of white speckling in the underparts. It showed also a yellow throat probably due to the pollen of the flowers it visited earlier. Later, in the same site, we found an adult male Veraguan Mango feeding in the same flowers. We reached the tideland of the Horconcitos river and decided then to take the road around the Cerro Batipa, which passes through several forest patches and through an immense teak plantation, finding Black-hooded Antshrike and Lance-tailed Manakin in several sites plus Yellow-olive Flycatcher and Pale-eyed Pygmy-Tyrant in the hill itself. Besides the Laughing Falcon and both Caracaras, others raptors found were Swainson's, Gray, Roadside and Zone-tailed Hawks, plus a flock of ten or more Swallow-tailed Kites around Cerro Batipa. We didn't reach the mangroves and probably we never had a real chance to find the cotinga without a guide. By noon, we said goodbye to Rafael, Osvaldo and Osvaldo Jr, who were returning to Panama City, while we returned to David with Milagros and Olmedo. The last bird we saw together was a White-collared Seedeater in the urban area. Then, we separate only to meet us again at the San Jose de David Fair, where we visited the commercial and agricultural exhibitions, among others. We said goodbye to them too... it was time to rest and to prepare for the next day.

Raptors' highway

It was 3:06 pm when I received a cell phone call. In the other side, Osvaldo only had to tell me once "I'm seeing thousands of them" in order to look through my office's window towards Ancon hill... they were there: thousands of little dark dots in the sky that a closer look revealed to be Broad-winged and Swainson's Hawks over the city. Each october, most of the world's population of these two hawks species, plus millions of Turkey Vultures, pass through the isthmus in their annual southward migration. Literally, you can see hordes of raptors, forming what looks like aerial highways over central Panama (including Panama City). It is an event that many citizens go unnoticed... but many does not mean all of them.

The history of counting migrating raptors goes back to 1996, when Dr. George Angher organized the first simultaneous raptors counts at the narrowest part of the isthmus (you can read more in the Panama Audubon Society web site, under "Projects"). Now, it is a serious task, with many qualified and experienced persons counting in several strategic points. The time and effort invested to document this marvel is worth admiring and reminds me others more renowned places (Veracruz River of Raptors in Mexico comes to my mind). These observation places are located along the Panama Canal. Traditionally, Ancon hill has been the most important observation site throughout the years, usually counting more than one million birds per season and that, my friends, is something that only happens in few places around the globe. The hill dominates Panama City and still is covered with dry forest that host many widespread species (birds, mammals, and others). It is within the city, so accesible that even the city's Major visited the place this season to watch the huge flocks of raptors.

Why is Panama so important for these raptors? A quick glimpse to any world map will give you an idea of the answer. Panama is an obligated pass in most of the main migration routes in the Americas, and it doesn't involve flying over large stretchs of ocean. This is important because the raptors need the ascending thermal currents to gain altitude, to glide then towards the base of the next thermal current, repeating the process again and again.

At least in Panama, the Swainson's Hawks rest hidden in open fields with tall grass, while the Broad-winged Hawks rest in forested areas. Few octobers ago, birding the Escobal road towards Achiote (Colon province in the Caribbean slope) early in the morning, I saw a single Broad-winged Hawk flying from the canopy of the surrounding forest... then other, and other, and other, and so on... I counted at least 200 lazy hawks in a couple of minutes, waking up in order to continue its journey... an amazing show that I will remember forever.

As bonus, the main flocks also can bring with it some scarcer species, like Northern Harrier, Sharp-shinned Hawk, Merlin, and others, so it is always a good idea to double check those flocks each time you have the chance. In any case, the mere phenomenon of thousands of raptors flying over you deserve a look, don't you think?

If you have the opportunity to visit Panama during the migration season, or are a resident here, don't forget to look at the sky... you can be surprised! On the other hand, if you don't have the opportunity, follow this season's daily counts in one of the strategic points (Semaphore hill) here.