After
each walk (usually on Tuesdays, as of 2022), Alan files a "walk report" listing all
the birds that were seen on the walk. He also includes the people that walked,
the temperature, and how the walk went that day. This section holds the most current report.
Along
with the walk reports every week, two plots of bird species observed versus
time are updated. One of these (birds_time) shows the number seen versus time
from 1987 to the present. The other (birds_epoch) shows the same data but
on a one-year timescale with all yearly time plots superimposed on each other.
This
section is filled with all the past walk reports. They are all kept to see trends
over the years in the birds sighted by the group.
The above link takes you to 6 plots of 30
birds each showing the number of times each species was observed by week number over the period 1986-2023.
The above link takes you to 6 plots of 30 birds each showing the probability that a species was observed during the year over the period 1987-2023.
The above link takes you to 6 plots of 30 birds each showing the probability that a species will be observed in 2024 for each week. The probabilities
are based on data from 2016-2023.
This section contains 4 plots. The first is a plot showing the number observed in 2023 by week number,
and the maximum, minimum, and median numbers observed by week number. The second plot shows the scores for the walks in 2024, which is the number of
standard deviations away from the average for all the walks held during that week from 1987 to present. The third plot shows the yearly ranking, which is the average over the year of the weekly walk scores. The fourth plot shows cumulative unique species observed by year.
This
Excel workbook contains the raw data collected on the walks organized by year.
