Charles River 5/1

From Sylvia Martin:

Several  birders joined me for a walk along the Charles River from Watertown Square going toward Waltham and then looping back on a perfect spring day.

Canada goose   9   only 1 was a chick; where were its nestmates?
mute swan   1   flying overhead
mallard 7
double-crested cormorant  2
gbh   1
herring gull 4
great black-backed gull 1
mourning dove   4
chimney swift   3
downy w.p.   2
n. flicker   1
e. phoebe 1   flycatcing over the river
WARBLING VIREO   3, singing
Am. crow  5
tree swallow   6
b-c chickadee  2
tufted titmouse  3
gray catbird   3
E. starling   2
yellow warbler  7, maybe more, singing away
yellow-rumped warbler   5
song sparrow  6
n. cardinal   3
red-winged blackbird   many incl. 1 subadult male and several females
common grackle    11, beautiful in the sun
BALTIMORE ORIOLE  2
Am. goldfinch   3

Also, a number of herring and/or other small fish were seen under the old black iron bridge that's not over the river but parallel to it, covering
an inlet. Two environmental cops were checking them out also. A woman who has run "herring run" walks said that gulls show up in large numbers during the peak of the herring run.