Tag Harness Sizes

This table lists harness sizes for the pre-fabricated ‘figure eight’ leg loop harness method based on real sizes used on individuals tagged in the field. Sizes include the length of the entire single leg-loop, but do not include overlap with the tag. Weights can be used to help specify which harness size to use.

Please note that these are guidelines. Regardless of what sizes you find here, the harness should always be fitted to the individual. Please see a How to Tag Animals for more information.

Species	Harness Size (mm)	Weight (g)	Sample size
Yellow-billed Cuckoo	50-61	43-80	10
Black-billed Cuckoo	52	34	1
Hammond's Flycatcher	29	9.5	1
Dusky Flycatcher	34		1
Say's Phoebe	37	23.5	1
White-eyed Vireo	28-34	9-12	5
Warbling Vireo	33-35	13-14	3
Red-eyed Vireo	39-42	15-20	100+
Bank Swallow	32-34	10-13	50+
Barn Swallow	34-37	17-19	80+
House Wren	33	11	1
Eurasian Reed Warbler	30	9-13	60+
Gray-cheeked Thrush	50-54	26-37	30+
Bicknell's Thrush	46-50	24-30	12
Swainson's Thrush	48-52	25-36	100+
Brown Thrasher	62	67	1
Golden-winged Warbler	29	8	1
Orange-crowned Warbler	29-32	8-10	4
Kentucky Warbler	34-35	12-15	2
Hooded Warbler	30-34	9-14	4
Magnolia Warbler	24-28		?
Blackpoll Warbler	33-36	10-22	200+
Black-throated Blue Warbler	26-28		?
Palm Warbler	26-34	9-12	5
Yellow-rumped Warbler (Myrtle)	31-34	10-15	100+
Prairie Warbler	26-29	7-10	7
Canada Warbler	34	10-12	?
Yellow-breasted Chat	40-42	22-25	4
Saltmarsh Sparrow	36-39	18-20	60+
Clay-colored Sparrow	30-31	9-12	7
Field Sparrow	30-32	12-13	6
Lark Sparrow	32-42	20-28	1
White-crowned Sparrow	44	31	1
White-throated Sparrow	45-50	23-31	100+
Savannah Sparrow (Ipswich)	38-44	21-30	100+
Eastern Towhee	50	40	1
Summer Tanager	39-40	26-27	2
Blue Grosbeak	37	26	1
Indigo Bunting	34-36	14-17	10
Painted Bunting	34		1
Dickcissel	38-44	22-32	3
Orchard Oriole	40-42	19-22	2