Date: 12/6/18 1:40 pm
From: DJ Lauten and KACastelein <deweysage...>
Subject: [obol] Re: new CBCs and gaps
I second that emotion.......

Dave Lauten

On 12/6/2018 1:27 PM, Alan Contreras wrote:
> Ugh.
> Alan Contreras
> <acontrer56...> <mailto:<acontrer56...>
> Eugene, Oregon
> <>
>> On Dec 6, 2018, at 1:24 PM, W. Douglas Robinson
>> <w.douglas.robinson...> <mailto:<w.douglas.robinson...>>
>> wrote:
>> Here he goes again…eBird this, eBird that. But, why do we need new
>> CBCs to fill gaps in winter bird information?
>> We could have fun visiting a poorly-counted place, coordinate the
>> counting so multiple teams are out on the same day in nearby areas,
>> and share results at the end of the day over hot food and drinks, all
>> without the paperwork and bu-ro-crazy of a CBC.
>> In fact, simply eBirding the effort could be argued to be more
>> scientifically useful. If each party created new checklists for each
>> place they counted birds, instead of summing up (guessing) how many
>> birds of each species they had all day long in their CBC section,
>> then the counts are actually much more useful for repeat efforts in
>> the future.
>> Let’s face it, CBC protocol has barely changed in 100 years. But we
>> have learned a whole lot about the problems of using such bird count
>> data to learn much that is scientifically defensible about population
>> changes over time. One of the biggest challenges is not knowing
>> exactly where the data were gathered (variation from year to year in
>> routes, time at stops in sector, different observers who count
>> numbers in different ways, etc, ad nauseam). With eBird it is very
>> easy to create new personal locations at each stop you make all day
>> long and keep more accurate count data that someone then has a chance
>> to repeat with some level of confidence they are doing it the same
>> way you did.
>> No constraints of staying inside the circle of a diameter that has no
>> clear biological justification. No commitment to try and count it
>> every year. No worries about minimum number of people participating.
>> Also no worries about site overlap or avoiding double counting. All
>> the modern bird counting literature says that we can soooo much more
>> about bird numbers when we DO count the same sites more than once.
>> Identify some of the under-birded places, gather up interested
>> friends to go count birds, archive the data in eBird (call it a CeBC,
>> if you will), socialize, and then go find another under-explored
>> place next time.
>> At some future time, eBorg will eat the CBC database anyway. It makes
>> logical sense and National Audubon is an eBird partner. Maybe this
>> dire prediction of assimilation gives us a little extra willingness
>> to feel like we can make meaningful contributions without being
>> inside an official circle.
>> But continue supporting your favorite CBCs. I look forward to a
>> couple myself this winter.
>> Doug
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