Table 2. Number of Osmia cornifrons and O. taurus nests recovered from Toronto from 2018–2020.

Number of brood cells for each nest, and number of individuals alive and dead (with reason provided) are given.

							Dead
Year	Species	Site	Nest #	# Brood	# Alive	Sex	# Parasite	# Moldy
2018	O. cornifrons	a	1	2	2	2M	0	0
Subtotal		1 total	1	2	2	2M	0	0
2019	O. cornifrons	b	1	6	3	3F	1	2
			2	4	2	2F	2	0
		c	1	14	10	3F:7M	0	4
			2	1	0	–	0	1
			3	8	7	2F:5M	0	1
		d	1	5	5	1F:4M	0	0
Subtotal		3 total	6	38	27	11F:16M	3	8
	O. taurus	e	1	12	11	7F:4M	1	0
			2	12	8	2F:6M	3	1
			3	1	0	–	0	1
			4	1	0	–	0	1
			5	8	4	2F:2M	1	3
		f	1	5	5	4F:1M	0	0
			2	10	10	7F:3?	0	0
			3	9	8	7F:1M	0	1
		g	1	1	1	1F	0	0
			2	15	8	6F:2M	0	7
		h	1	2	2	2F	0	0
			2	10	10	6F:4M	0	0
Subtotal	O. taurus	4 total	12	86	67	44F:20M:3?	5	14
2020	O. cornifrons	i	1	1	1	1F	0	0
	O. taurus	g	1	7	7	3F:4M	0	0
Both years	O. cornifrons	5 total	8	41	30	12F:18M	3	8
	O. taurus	4 total	13	93	74	47F:24M:3?	5	14
Total		8 total	20	134	104	59F:42M:3?	8	22