- Rec(1991)19E / 11 January 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 19 (1991) on the protection of the pardel lynx (Lynx pardinus) in the Iberian peninsula, adopted by the Standing Committee on 11 January 1991
- Rec(1991)20E / 11 January 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 20 (1991) on the protection of the European lynx (Lynx lynx), adopted by the Standing Committee on 11 January 1991
- Rec(1991)21E / 11 January 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 21 (1991) on the conservation of insects of the order Hymenoptera and their habitats, adopted by the Standing Committee on 11 January 1991
- Rec(1991)22E / 11 January 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 22 (1991) on the conservation of the pearl mussel (Margaritifera margaritifera) and other freshwater mussels (Unionoida), adopted by the Standing Committee on 11 January 1991
- Rec(1991)23E / 11 January 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 23 (1991) on the protection of the habitat of Vipera ursinii rakosiensis in Hungary, adopted by the Standing Committee on 11 January 1991
- Rec(1991)24E / 11 January 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 24 (1991) on the protection of some beaches in Turkey of particular importance to marine turtles, adopted by the Standing Committee on 11 January 1991
- Rec(1991)25E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 25 (1991) on the conservation of natural areas outside protected areas proper, adopted by the Standing Committee on 6 December 1991
- Rec(1991)26E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 26 (1991) on the conservation of some threatened reptiles in Europe, adopted by the Standing Committee on 6 December 1991
- Rec(1991)27E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 27 (1991) on the conservation of some threatened amphibians in Europe, adopted by the Standing Committee on 6 December 1991
- Rec(1991)28E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 28 (1991) on the use of non-toxic shot in wetlands, adopted by the Standing Committee on 6 December 1991
- Rec(1991)29E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 29 (1991) on the conservation of wetland invertebrates, adopted by the Standing Committee on 6 December 1991
- Rec(1991)30E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 30 (1991) on conservation of species in Appendix I to the convention, adopted by the Standing Committee on 6 December 1991
- Rec(1991)31E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 31 (1991) on the protection of the European mink (Mustela lutreola), adopted by the Standing Committee on 6 December 1991)
- Rec(1991)32E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 32 (1991) on the protection of the sources of the River Pescara (Popoli, Pescara Province, Italy), dopted by the Standing Committee on 6 December 1991
- Rec(1991)33E / 6 December 1991
Convention on the Conservation of European Wildlife and Natural Habitats - Recommendation No. 33 (1991) on the conservation of the natterjack toad (Bufo calamita) in Ireland, adopted by the Standing Committee on 6 December 1991
