Bar Graph style checklists

[Stan DeOrsey]

I suspect all of you are familiar with the checklist style which uses a
bar of variable thickness across a year to show the approximate
abundance of each species by month. I am trying to discover when this
style was invented and first used for birds. I am aware of two Chester
Reed books from 1912 which uses this style. Does anyone know of any
earlier for any location? I suspect these exist back hundreds of years
for plants but maybe not. Anyone know of uses in the 1800s or earlier?
Thanks.

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Stan DeOrsey js...@att.net

[Anne Williams]

https://www.masswerk.at/minard/

Stan, this graphic pertains to movements of mammals (soldiers) rather than birds, and is from 1869.

The brown is for the advance, and the gray for the retreat.  Hover the text to get a translation from the French.

Anne

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