Dear Cobirders,
I led three brave souls through snowy Walden Ponds this morning for
the Boulder Bird Clubs First Sunday Bird Walk. Although species
numbers were low, we had great looks at adult Bald Eagles, nearly two
dozen American Tree Sparrows and a cooperative Sharp-shinned Hawk.
Following the bird walk, I headed over to Erie Reservoir to try and
photograph the first cycle Glaucous-winged Gull I saw there yesterday.
When I arrived at Erie Reservoir, an adult Bald Eagle immediately
flushed the large group of Gulls present and most of them flew east.
The remaining Gull numbers were low, but a trip to Thomas Reservoir
revealed that the masses hadn't flown far away. On the way to Thomas
Reservoir, I relocated the dark-morph Rough-legged Hawk I saw
yesterday on the lowermost telephone line along 287 just north of Erie
Reservoir.
When I arrived at Thomas Reservoir, there were about 2000 Gulls, which
immediately flushed (Raptors again!). Half of the flock, including
one first cycle Great Black-backed Gull headed east towards Erie
Landfill, while the remaining birds, mostly Ring-billed Gulls, settled
back down. While scanning this group, I spotted two Chihuahuan Ravens
(size, and vocalization, tail shape &c) and Horned Larks. One of the
Ravens was making a neat sound like a rotary phone dial. This is the
second time I've heard a Raven (both times presumed Chihuahuan) make
this sound while at Thomas Reservoir.
Cheers,
Walter Szeliga
Boulder, CO
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