![leech_hirudo_verbena.jpg leech_hirudo_verbena.jpg](thumb/t_leech_hirudo_verbena.jpg)
Medicinal Leech Hirudo verbena Parasite Pollution indicator species |
![leech_sp_head.jpg leech_sp_head.jpg](thumb/t_leech_sp_head.jpg)
Leech species, head Stream species Pollution indicator species |
![leech_sp2.jpg leech_sp2.jpg](thumb/t_leech_sp2.jpg)
Leech species Pond species Pollution indicator species |
![leech_sp3.jpg leech_sp3.jpg](thumb/t_leech_sp3.jpg)
Leech species Parasite Pollution indicator species |
![leech_sp4.jpg leech_sp4.jpg](thumb/t_leech_sp4.jpg)
Leech species Stream species Pollution indicator species |
![leech_sp.jpg leech_sp.jpg](thumb/t_leech_sp.jpg)
Leech Sp. Lake Species Pollution Indicator |