Table 2.

The different forms of social organization identified in our primary literature research, compared with the social organization provided by Lukas & Clutton-Brock [7]. Numbers refer to the numbers of studies reporting the form of social organization. BS, breeding season; NBS, non-breeding season. References are in the electronic supplementary material.

species	Lukas & Clutton-Brock	solitary	pair	one male –several females	multi-males	multi-females	Multi-male–multi-female
Soricidae (shrews)
Crocidura leucodon	solitary		1 (BS)				1 (NBS)
Crocidura russula	solitary	1	2 (BS)		1 (NBS)	2 (NBS)	1 (NBS)
Crocidura shantungensis	solitary	1
Cryptotis parva	solitary						1
Neomys fodiens	solitary	1
Sorex araneus	solitary	2
Sorex cinereus	solitary						2 (BS)
Sorex coronatus	solitary	1 (NBS)	1 (BS)
Sorex ornatus	solitary			1 (NBS)			1 (BS)
Sorex unguiculatus	solitary	1
Suncus varilla	solitary	1	1
Talpidae (moles)
Galemys pyrenaicus	solitary	3	3
Talpa europaea	solitary	1
Talpa romana	solitary	2
Urotrichus talpoides	solitary	1 (BS)	1 (NBS)
Erinaceidae (hedgehogs and gymnures)
Erinaceus europaeus	solitary	1