Sunday, April 25, 2010

A brief rest and then...

Blue has now covered just under 1500 miles of the approximately 8500 miles it will take to get to Rankin Inlet. His route north remains somewhat similar to that taken south (purple = southern route, blue = northern route).

Route up to April 25

Acquiring 12 locations per day (1 fix every 2 hours) tells us a great deal about active and sedentary periods...for example, this peregrine habitually travels at a approximately 30 mph, starts out at about 10 a.m. on migrations days, and usually stops to roost between 8 p.m. and 9 p.m. So...generally active for about 10 hours and sedentary for about 14 hours per day. Of course, there is some variability; here's a brief synopsis of activity between the 20th and 24th...

20 - 21 = sedentary
22 = 400 miles
23 = 285 miles
24 = 229 miles

Locations on the 20th and 21st were concentrated among 4 or5 areas of about 8 square miles each that appear to be fenced and are apparently (Panoramio images) grazed by livestock (cattle and/0r goats) .

Goats

Cattle

The area appears to be quite arid, and some watering holes like the one below are artificial. These locations are probably permanent and are undoubtedly very attractive to many bird species in the area.. It's likely that Blue hunted these watering holes before resuming migration.

Livestock watering hole

...more soon, Alastair.