Tweeters:

Here in Vancouver Ravens are common and can be seen basically in every
month of the year. For over a year now I have been conducting an almost
daily bird count in a local park. I have not put in last fall's data in
the spreadsheet yet, but I do recall that there was an increase in Raven
during October. There is an increase during the last week of February and
the first two of March. If my recollection of the increase in October is
correct, then it appears that Ravens may actually be migrating through
Vancouver during those periods. Perhaps they are heading to the San Juan
Islands, or perhaps the Bellingham area?
This morning I saw a flock of 8 flying over the park, way up high. All
were flying directly south. I have no idea what these may have been doing,
but they certainly were coming from the North Shore mountains judging
from their direction of flight. This flock is the largest I have recorded
from my park and its the middle of the winter when they shouldn't be migrants.
So it appears that the movements of Ravens are complex, with movements in
and out of the mountains.

Al Jaramillo
jaramill at sfu.ca
Vancouver, B.C.