| | | 1995 | 101 |
| | | 2000 | 84 |
| | | 2002 | 314 |
| | | 2005 | 185 |
| | | 1988 | 165 |
| | | 1997 | 87 |
| | | 1996 | 140 |
| | | 2000 | 103 |
| | | 2003 | 75 |
| | | 2004 | 272 |
| | | 2011 | 344 |
| | | 2009 | 112 |
| | | 2003 | 175 |
| | | 2004 | 175 |
| | | 1990 | 108 |
| | | 1995 | 89 |
| | | 1997 | 278 |
| HistoryJournal:The Gardens' Bulletin, Singapore | | 1995 | 98 |
| | | 2002 | 112 |
| MammalsJournal:The Gardens' Bulletin, Singapore | | 1995 | 140 |