This page is for the listers. If Big Days, Big Years, and County Listing increase your enjoyment of birding, then this page is for you. Listing is a long-
Most of the data on this page is culled from eBird, but there are serious birders out there who choose not to use eBird, so we’ve probably missed a few data points. Additions and corrections to these data should be sent to Mouser Williams (mouser@mouser.org).
Los Alamos County Life Lists
Los Alamos County is not an easy county to accululate large species totals. While we have nearly 5,000′ of vertical extent within the county, we lack water habitats almost entirely. The table below lists everyone we’re aware of who has reported 150 or more species in the county in their lifetime.
| Rank | Name | Species |
| 1 | Stephen Fettig | 237 |
| 2 | Joe Fitzgibbon | 226 |
| 3 | Mouser Williams | 221 |
| 4 | Terry Hodapp | 216 |
| 5 | Dave Yeamans | 197 |
| 6 | Mary Brown | 183 |
| 7 | Carolyn Mangeng | 178 |
| 8 | Dale Spall | 175 |
| 8 | Bob Loy | 175 |
| 10 | Christopher Rustay | 170 |
| 11 | Craig Martin | 162 |
| 12 | Michael Smith | 159 |
| 13 | Brent Thompson | 153 |
| 14 | Rebecca Shankland | 152 |
| 15 | Jason Lott | 150 |
This table was last updated on 23 Nov 2016. For a daily-updated version maintained by eBird (which includes species counts below 150 but which lacks any contributions from those who do not use eBird), click here.
A special recognition should be given to Christopher Rustay, the only person on this list who has never lived in Los Alamos County.
Los Alamos County Big Years
Like any Big Year, a Los Alamos County Big Year requires careful planning and dedication. One of the benefits of such a small county is that a Big Year in the county does not require an inordinate amount of travel time or expense. However, the relatively large vertical extent of the county packed into such a small space means that the birder must spend a lot of time going up and down, often on foot. The paucity of water habitats means that a Big Year contender must visit what artificial bodies of water there are frequently hoping for that one vagrant shorebird or duck just visiting for a few hours. The table below lists everyone we’re aware of who has reported 100 or more species in the county in one calendar year.
| Rank | Name | Species | Year |
| 1 | Mary Brown | 183 | 2016 |
| 2 | Mouser Williams | 182 | 2016 |
| 3 | Stephen Fettig | 171 | 2013 |
| 4 | Joe Fitzgibbon | 162 | 2013 |
| 5 | Terry Hodapp | 158 | 2013 |
| 6 | Dave Yeamans | 151 | 2013 |
| 7 | Bob Loy | 150 | 2016 |
| 8 | Jason Lott | 150 | 2016 |
| 9 | Carolyn Mangeng | 134 | 2016 |
| 10 | Craig Martin | 134 | 2015 |
| 11 | Dale Spall | 132 | 2016 |
| 12 | Brent Thompson | 125 | 2015 |
| 13 | Michael Smith | 124 | 2015 |
| 14 | Luke Laeser | 121 | 2015 |
| 15 | Jeff & Cheryl Heikoop | 117 | 2016 |
| 16 | Christopher Rustay | 116 | 2016 |
| 17 | Robin Gurule | 112 | 2016 |
| 18 | Bob Walker | 107 | 2016 |
| 19 | Steve Knox | 106 | 2016 |
| 20 | Wyatt Egelhoff | 105 | 2015 |
| 21 | Jake Turin | 102 | 2015 |
| 22 | Dave Krueper | 101 | 2009 |
This table was last updated on 23 Nov 2016.
Los Alamos County Big Days
A Big Day in Los Alamos County inevitably means a lot of hiking, and generally with a hefty vertical component to it. The time of year has an enormous impact on what species are available, so Big Days are split out here by month. As of this writing, only a few Big Days have been attempted. More are encouraged (preferably some that don’t include yours truly).
| Month | Participant(s) | Species | Date |
| May | Rustay & Williams | 106 | 14 May 2016 |
| June | Egelhoff & Williams | 94 | 8 Jun 2015 |
| September | Williams | 41 | 24 Sep 2016 |
| November | Williams | 49 | 25 Nov 2016 |
This table was last updated on 26 Nov 2016.