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big year Birding Costa Rica central valley

Hook-billed Kite Makes Bird 533 for 2011!

August is already here and I am pretty sure I heard the call note of a Yellow Warbler this morning. Oh yes, bring on the migrants and have them fly over Santa Barbara, Costa Rica. We have some quality habitat right next door at the Finca Rosa Blanca Boutique Hotel and in remnant moist forest near the Hotel Catalina. After getting in some R and R in those places, they can head on over to Braulio Carrillo National Park and the rainforests of the Talamanca Mountains. I just hope that any rare migrants will let me see or hear them so they can make it onto my illustrious 2011 list. A bunch of migrants and concerted efforts to get “seeable” species missing from this year’s list should help me reach 600 species by December 31st.

I got one of those seeable, unpredictable species today in the form of a Hook-billed Kite. Bird number 533 happened to be soaring above the road as I was driving home from my daughter’s daycare (she calls it, “escuela de Miranda”). Noticing that the soaring bird wasn’t a vulture or Short-tailed Hawk (the expected soaring raptors around here), I kept an eye on it until it banked and confirmed my suspicions with its longish barred tail, smallish head, and broad, “paddle-shaped” wings. I really don’t know if that’s the best description of their wings but I guess it works. You might also say that their primaries look “rounded” or “hand-like”. Whatever. Suffice to say that the shape is so distinct that it can’t be confused with anything else in range.

As testament to the unpredictable nature and uncommon status of Hook-billed Kites in Costa Rica, this was my first in that area despite having driven along the road between San Joaquin and Santa Barbara dozens of times. However, it doesn’t surprise me that I hadn’t seen it before, nor do I find it all that surprising that one showed up where it did. I admit that sounds like some ditty from Alice in Wonderland but before you accuse me of drinking tea with Mad Hatters, allow me to explain:

  • Tropical habitats are so rife with species occurring at naturally low densities that predicting where and when they will show up becomes a rather unpredictable guessing game. When the habitat looks perfect for so and so species, there’s a good chance it’s somewhere out there but that doesn’t mean you are going to see it within an hour’s time or even that same day. It might be on the other side of its territory or just staying out of sight. Even if you know where and how to look for the bird, you might have to rely on probability eventually playing out in your favor by hanging out in one spot until it shows up. So, I’m not surprised that I hadn’t seen Hook-billed Kite where I did because I only spend a fraction of time there each day as I drive past.
  • The habitat looked good for Hook-billed Kite. I wasn’t overly surprised that one of these snail-eating raptors did show up because of where I saw it. In Costa Rica, Hook-billed Kites seem to be most common in middle elevation moist forests on the Pacific Slope (such as near Santa Elena of Monteverde fame, riparian areas in Guanacaste, and forests in the Central Valley), and bird number 533 for 2011 was soaring near a sizeable patch of such forest that also happens to be connected to a riparian corridor.

I wasn’t so sure about getting that one for the year so I’m pretty happy that it decided to take to the air on morning thermals. I wonder which species will be next?