| xa | lxb | mxc | lxmxd |
| 0 | 1.0 | 0 | 0 |
| 1 | s0 | b | s0b |
| 2 | s0s1 | b | s0s1>b |
| 3 | s0s1s | b | s0s1>bs |
| 4 | s0s1s2 | b | s0s1>bs2 |
| . | . | . | . |
| . | . | . | . |
| . | . | . | . |
| x | s0s1sx-2 | b | s0s1>bsx-2 |
| aage in years |
| bprobability of survivorship to age x |
| cfemale fledglings per female aged x | dnet maternity function |