My concerns about Coley are over. He is moving in his winter home, just not much. Most of his activity – or non activity – is focused in an area of less than 0.25 miles across in what seems to be a number of low dead snags out in a grass marsh with a nice edge of trees or large shrubs south of him. Since he is alone, feeding only himself, he does not need to do much fishing for food. A short trip out from this area and he is in prime fishing grounds. He only needs a 12 inch fish once every day or so and he is happy. So he sits and eats or just sits, until the next fishing trip.
You may ask, “Well, why don’t we see more movement if he is fishing every day or so?”. Colombia is currently one hour ahead of us (EST), so our first satellite reading is 5am (10am if you click on a data point on the Google Earth map) in the morning and the last is 9pm at night, thus we cover all of the daylight hours. But remember that each hourly data point we receive is just that, one point in time. So he could leave a perch just after we get a data point, and return before the next data point and have fished for nearly 60 minutes. In other words, since he flew out and returned in between “fixes”, we show that he did not move during that hour. Comprendes?
In this report we cover the period from October 9th to the 22nd. During this time, we note only 7 flights away from his roosting/resting area, the longest of which is about 3.22 miles away. The other six flights are all within 1.25 miles from his roosting area. There are three data points that range from 25 to 35 miles away from his roosting area as you’ll se on the map. If you click on any of these three points in the interactive Google Earth Map, you will see that they are all 2D (2 dimensional) fixes. These are not accurate points and we would discard them in any analysis of his movements.
To sum it all up, Coley seems to be happy, healthy, and taking it easy in his winter home in Bird Marsh in northern Colombia.
Next report to follow in about 10 days, unless of course Coley does leave Bird Marsh for another destination.
Thanks again to all of you for your input and support. Coley and Dr. Bob Signing off.