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Hallaq, S., Abdullah, Y. and Samir J. Bilal 2024. Seasonal variation, group/ solitary behavior occurrence and reproduction time of the predator leech Helobdella stagnalis (Hirudenia: Glossiphoniidae) in Sarchnar Stream/ Sulaymaniah Province, Kurdistan Region- Iraq. Zanco Journal of Pure and Applied Sciences. 36, 2 (Apr. 2024), 87–95. DOI:https://doi.org/10.21271/ZJPAS.36.2.8.