| 2026-03-17 | ___ monster (Southwest reptile) |
| 2025-11-21 | ___ monster |
| 2025-08-26 | ___ monster (only venomous lizard native to the U.S.) |
| 2025-04-17 | Cold-blooded kind of monster |
| 2025-02-09 | Tributary of the Colorado River |
| 2024-09-11 | New Mexico's ___ National Forest |
| 2024-05-02 | ___ monster |
| 2021-08-31 | ___ monster |
| 2020-05-28 | ___ monster |
| 2020-01-18 | ___ monster |
| 2019-12-29 | Kind of monster |
| 2019-07-10 | River to the Colorado |
| 2019-05-31 | River that meets the Colorado at Yuma |
| 2019-04-09 | Colorado feeder / Sacha Baron Cohen character |
| 2018-03-29 | ___ monster |
| 2018-01-15 | ___ monster (desert denizen) |
| 2017-12-24 | Colorado tributary |
| 2017-05-17 | Tributary of the Colorado |
| 2016-12-01 | Sonoran Desert river |
| 2016-11-07 | ___ monster (desert lizard) |
| 2016-02-17 | ___ monster |
| 2016-01-07 | Colorado tributary |
| 2014-07-18 | River to the Colorado |
| 2013-03-24 | River of Phoenix |
| 2012-08-15 | Arizona county or river |
| 2011-02-16 | Colorado feeder |
| 2010-09-06 | ___ monster |
| 2009-10-01 | Arizona's ___ Mountains |
| 2009-09-05 | River of Yuma and Phoenix |
| 2008-06-12 | Arizona county or river |
| 2008-01-15 | Tributary of the Colorado |
| 2007-10-14 | Grand Canyon State stream |
| 2006-06-10 | Coolidge Dam's river |
| 2006-06-07 | River to the Colorado |
| 2006-04-02 | Coolidge Dam river |
| 2005-07-31 | ___ monster |
| 2005-07-30 | Colorado feeder |
| 2005-04-20 | Arizona river |
| 2004-07-01 | Arizona river |
| 2003-08-18 | ___ monster |
| 2002-12-28 | Coolidge Dam's river |
| 2002-06-03 | Southwestern river |
| 2001-03-16 | Tributary of the Colorado |
| 2000-09-26 | Kind of monster |
| 2000-02-07 | ___ monster |
| 1999-06-13 | River to the Colorado |
| 1998-08-27 | Colorado feeder |
| 1998-05-18 | ___ monster |
| 1996-10-16 | ___ monster |
| 1996-02-14 | Arizona river |
| 1995-11-19 | Colorado tributary |
| 1995-11-06 | Type of monster |
| 1995-06-08 | Reptilian "monster" |
| 1994-10-12 | Desert monster |