Re: [cobirds] What CBC data can tell us about House Sparrows in Colorado Springs

2018-04-13 Thread Joe Roller
I'm mostly interested in number of individuals divided by total party hours for the count. Joe On Fri, Apr 13, 2018 at 2:15 PM, Diana Beatty wrote: > While I do think participation count and participation man hours matter, > it only goes so far. For example, having 2 people in an area report 1

Re: [cobirds] What CBC data can tell us about House Sparrows in Colorado Springs

2018-04-13 Thread Douglas Eddy
Hi again, After beginning some attempts at correcting for effort (thanks for pointing that out, Joe Roller!), I'm still playing with different ways to quantify things. I can share two possible points of interest: --Diana's suggestion that the 2016 count may have been low due to poor weather and t

Re: [cobirds] What CBC data can tell us about House Sparrows in Colorado Springs

2018-04-13 Thread Diana Beatty
While I do think participation count and participation man hours matter, it only goes so far. For example, having 2 people in an area report 10 birds does not mean that 4 people should have found 20 birds - either group might do equally well at finding the same birds present. The ability of the pa

Re: [cobirds] What CBC data can tell us about House Sparrows in Colorado Springs

2018-04-13 Thread Diana Beatty
2016's low count is likely a product of the weather that day - we had a blizzard with temps around 0 degrees Fahrenheit - some areas of the circle may not have had the usual level of participation due to that weather, as well. In reading all these posts a few questions that occurred to me were 1.

[cobirds] What CBC data can tell us about House Sparrows in Colorado Springs

2018-04-13 Thread douglitas
Hi all, First off, hi! I'm brand new to this list. As dumb luck would have it, the first post I ever received was yesterday from Diana Beatty. She had the wonderful idea to do a linear regression on Christmas Bird Count (CBC) data from Colorado Springs to see if there has been a decline in Ho