Landscape is mostly covered by forested mountains, such as Khao Noi in the north and Khao Pradu in the south.
The total mountained area is 88%, divided into 33% high slope mountain area (upper-slopes, shallow valleys, mountain tops and deeply incised streams) and 55% hill slope area (open slopes, u-shaped valleys and midslope ridges). There are plains for 12%.[7]
History
In 1992 a survey was set up by the Phitsanulok Regional Forestry Office for Khao Noi–Khao Pradu forest area and many wild animals were found here. In 1994 the forest area on both sides of the Khwae Noi River were surveyed and also many kinds of wild animals were found there. Later in 1998 the Ministry of Agriculture and Cooperatives proposed that the area should be Khao Noi–Khao Pradu Non-hunting Area, which was publized in the Government Gazette, volume 115, issue 43 Ngor, dated May 28, 1998.[8] Since 2002 this non-hunting area has been managed by Protected Areas Regional Office 11 (Phitsanulok).
^"Protected areas". UNEP-WCMC. 2020. Archived from the original on 2 October 2021. Retrieved 4 October 2021.
^"เขตห้ามล่าสัตว์ป่าเขาน้อยขเขาประดู่" [Khao Noi-Khao Pradu Non-Hunting Area]. Department National Parks, Wildlife and Plant Conservation (in Thai). Archived from the original on 8 November 2021. Retrieved 16 November 2021, พืันที่ - Area{{cite web}}: CS1 maint: postscript (link)
^"เขตห้ามล่าสัตว์ป่าเขาน้อยขเขาประดู่" [Khao Noi-Khao Pradu Non-Hunting Area]. Department National Parks, Wildlife and Plant Conservation (in Thai). Archived from the original on 8 November 2021. Retrieved 16 November 2021, Appendix 1 - LANDSAT satellite image (2010).{{cite web}}: CS1 maint: postscript (link)
^"เขตห้ามล่าสัตว์ป่าเขาน้อยขเขาประดู่" [Khao Noi-Khao Pradu Non-Hunting Area]. Department National Parks, Wildlife and Plant Conservation (in Thai). Archived from the original on 8 November 2021. Retrieved 16 November 2021, สภาพทั่วไป - General condition.{{cite web}}: CS1 maint: postscript (link)
^"เขตห้ามล่าสัตว์ป่าเขาน้อยขเขาประดู่" [Khao Noi-Khao Pradu Non-Hunting Area]. Department National Parks, Wildlife and Plant Conservation (in Thai). Archived from the original on 8 November 2021. Retrieved 16 November 2021, Appendix 4 - Landform.{{cite web}}: CS1 maint: postscript (link)
^"เขตห้ามล่าสัตว์ป่าเขาน้อยขเขาประดู่" [Khao Noi-Khao Pradu Non-Hunting Area]. Department National Parks, Wildlife and Plant Conservation (in Thai). Archived from the original on 8 November 2021. Retrieved 16 November 2021, ประวัติความเป็นมา - History.{{cite web}}: CS1 maint: postscript (link)
^"เขตห้ามล่าสัตว์ป่าเขาน้อยขเขาประดู่" [Khao Noi-Khao Pradu Non-Hunting Area]. Department National Parks, Wildlife and Plant Conservation (in Thai). Archived from the original on 8 November 2021. Retrieved 16 November 2021, Appendix 5 - Map of forest species.{{cite web}}: CS1 maint: postscript (link)
^"ประกาศกระทรวงเกษตรและสหกรณ์ ฯ ให้เป็นเขตห้ามล่าสัตว์ป่าเขาน้อย - เขปรดู่ พ.ศ.๒๕๔๑" [Announcement of the Ministry of Agriculture and Cooperatives,etc. to be Khao Noi-Khao Pradu Non-hunting Area. B.E.2541 (1998)] (PDF). Royal Thai Government Gazette. 115 (43 Ngor): 3–4. 28 May 1998. Archived from the original(PDF) on 20 November 2021. Retrieved 16 November 2021, Appendix: สัตว์เลี้ยงลูกด้วยนม - Mammals.{{cite journal}}: CS1 maint: postscript (link)
^"ประกาศกระทรวงเกษตรและสหกรณ์ ฯ ให้เป็นเขตห้ามล่าสัตว์ป่าเขาน้อย - เขปรดู่ พ.ศ.๒๕๔๑" [Announcement of the Ministry of Agriculture and Cooperatives,etc. to be Khao Noi-Khao Pradu Non-hunting Area. B.E.2541 (1998)] (PDF). Royal Thai Government Gazette. 115 (43 Ngor): 3–4. 28 May 1998. Archived from the original(PDF) on 20 November 2021. Retrieved 16 November 2021, Appendix: สัตว์ป่าจำพวกนก - Bird wildlife.{{cite journal}}: CS1 maint: postscript (link)
^"ประกาศกระทรวงเกษตรและสหกรณ์ ฯ ให้เป็นเขตห้ามล่าสัตว์ป่าเขาน้อย - เขปรดู่ พ.ศ.๒๕๔๑" [Announcement of the Ministry of Agriculture and Cooperatives,etc. to be Khao Noi-Khao Pradu Non-hunting Area. B.E.2541 (1998)] (PDF). Royal Thai Government Gazette. 115 (43 Ngor): 3–4. 28 May 1998. Archived from the original(PDF) on 20 November 2021. Retrieved 16 November 2021, Appendix: สัตว์ป่าจำพวกสัตว์เลื้อยคลาน - Wild reptiles species.{{cite journal}}: CS1 maint: postscript (link)
^"ประกาศกระทรวงเกษตรและสหกรณ์ ฯ ให้เป็นเขตห้ามล่าสัตว์ป่าเขาน้อย - เขปรดู่ พ.ศ.๒๕๔๑" [Announcement of the Ministry of Agriculture and Cooperatives,etc. to be Khao Noi-Khao Pradu Non-hunting Area. B.E.2541 (1998)] (PDF). Royal Thai Government Gazette. 115 (43 Ngor): 3–4. 28 May 1998. Archived from the original(PDF) on 20 November 2021. Retrieved 16 November 2021, Appendix: สัตว์ป่าจำพวกสัตว์สะเทินน้ำสะเทินบก - Wild amphibians species.{{cite journal}}: CS1 maint: postscript (link)
^"สวนอนุรักษ์สัตว์ป่า, เขตห้ามล่าสัตว์ป่า 14 แห่ง" [Wildlife Conservation Division, 14 Non-hunting areas]. Office of Conservation Area 11 (Phitsanulok) (in Thai). 2021. Archived from the original on 6 October 2021. Retrieved 22 September 2021.