House Finches

House Finches (Haemorhous mexicanus)

Identification: Small, streaky finch, 5–6 inches. Males have a raspberry-red wash on the head, breast, and rump — the red intensity varies with diet quality. Females and immature birds are plain brownish-gray with heavy dark streaking on the underside and no wing bars. Distinguished from purple finch by the house finch's sharper streaking on the flanks and belly, and the male's brighter, more localized red confined to the head and upper breast rather than an overall washed appearance.

Life cycle: Year-round resident in Middle Tennessee. Breeds March through August with 2–3 clutches of 2–6 eggs per season. Nests in dense shrubs, hanging planters, wreaths, dryer vents, and sheltered structural cavities. Highly gregarious outside of breeding season; winter flocks of 20–50 birds are common at feeders.

Damage signs: Concentrated seed consumption at bird feeders, rapidly emptying feeders and creating hulls and debris accumulations beneath them that can damage turf. Nests in hanging baskets and porch wreaths foul the plant material and block drainage. Berry crops on ornamental hollies, serviceberries, and dogwoods are stripped by foraging flocks. Contagious conjunctivitis (Mycoplasma gallisepticum) circulates through house finch populations and can contaminate shared feeders.

Treatment window: Nest establishment in early spring (March–April) is the window to deter structural nesting before eggs are laid. Feeder management is a year-round concern in areas with resident populations.

UT-recommended approach: Remove or suspend feeders for 2–3 weeks to disperse established flocks. Clean feeders with 10% bleach solution weekly during conjunctivitis outbreaks. Block structural entry points (dryer vents, open eaves) with 1/4-inch hardware cloth before March nesting begins. Relocating hanging baskets indoors until fledglings leave is the only legal option once eggs are present.