|  | 2004 | 2005a | 2006 | ||||||
---|---|---|---|---|---|---|---|---|---|---|
 | n | Found live | Found dead | Not found | Found live | Found dead | Not found | Found live | Found dead | Not found |
 |  |  |  |  |  | % |  |  |  |  |
Cottonwood | 58 | 72 | 16 | 12 | 52 | 0 | 33 | 63 | 0 | 21 |
Saltcedar | 64 | 94 | 0 | 6 | 58 | 0 | 42 | 73 | 1.5 | 25 |
Native shrubs | 63 | 87 | 6 | 6 | 57 | 0 | 37 | 65 | 8 | 14 |
Exotic shrubs | 97 | 91 | 3 | 6 | 53 | 4 | 40 | 66 | 5 | 22 |
Native trees | 83 | 76 | 11 | 13 | 51 | 1 | 37 | 64 | 0 | 24 |