Hi all,
Last year I sent out a document that had a few tables with interesting
year-end ebird statistics. I received some positive feedback from a few
other 'stataholics', so I've decided to run the same tables for 2012.
Included are a breakdown of species and checklists by month and county, top
20 most and least observed species, and a look at changes in species
reports from 2011 to 2012.
Some highlights -
eBirders submitted a record 58,180 checklists within MD in 2012 (a 17.8%
increase over 2011). Kudos to birders in Howard County; they had the
biggest jump in checklists from 2011 at +54.3% and now rank as the second
most ebirded county! It total, ebirders reported 5,463 county ticks and
2,826 month ticks for the year. Numbers which put all but a few of our
personal lists to shame.
The full report (300KB PDF) can be found here
http://www.mdbirding.com/Files/2012_MD_ebird_stats.pdf
Just another reminder to use caution in interpreting increases/declines in
a species checklist percentage. There are a whole slew of reasons why a
species might 'decline' on ebird from one year to another. Particularly in
2012, you'll notice a consistent decline in most waterfowl. When strong
trends like this occur, it might be more informative to look at species
that actually break the habitat trend (ie a waterfowl species that
increases when others all decrease). Of course, it would also be better to
look at species changes by season instead of an average over the whole
year. I might have to save that for a rainy day sometime. Anyway...hope you
enjoy.
Jared Fisher
Bethesda, MD
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