State · BBS 2025 Release · 1966–2024
New Hampshire Breeding Birds
176 species recorded across 26 survey routes, 1966 to 2024. Browse by family or guild below.
New Hampshire Bird Population TrendsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →
long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →
Herring Gull has collapsed in New Hampshire: down 100% on the route-weighted index since 1968.
long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →
Tufted Titmouse has surged in New Hampshire: up 203× on the route-weighted index since 1978.
long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →
Eastern Meadowlark has collapsed in New Hampshire: down 99% on the route-weighted index since 1968.
long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →
Northern Cardinal has surged in New Hampshire: up 178× on the route-weighted index since 1972.
long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →
Bank Swallow has collapsed in New Hampshire: down 97% on the route-weighted index since 1968.
long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →
Pine Warbler has surged in New Hampshire: up 58× on the route-weighted index since 1968.
How Bird Guilds Are Faring in New HampshireGuild trendA mean-index aggregate across the species in this group — the structural direction of the guild, with individual-species noise smoothed out.Full methodology →
New Hampshire Bird Survey Routes
Browse New Hampshire Birds By FamilyTrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
Each species links to its trend in New Hampshire.
Hawks, Eagles & Kites Accipitridae
Kingfishers Alcedinidae
Ducks, Geese & Waterfowl Anatidae
Swifts Apodidae
Waxwings Bombycillidae
Cardinals & Grosbeaks Cardinalidae
New World Vultures Cathartidae
Treecreepers Certhiidae
Plovers & Lapwings Charadriidae
Crows, Jays & Magpies Corvidae
Falcons & Caracaras Falconidae
Finches Fringillidae
Loons Gaviidae
Swallows & Martins Hirundinidae
Blackbirds & Orioles Icteridae
Osprey Pandionidae
Wood-Warblers Parulidae
American Redstart -24%Bay-breasted Warbler -82%Black-and-white Warbler -7%Black-throated Blue Warbler +231%Black-throated Green Warbler +159%Blackburnian Warbler +168%Blackpoll Warbler -70%Blue-winged Warbler -29%Canada Warbler -86%Cape May Warbler -66%Chestnut-sided Warbler +4%Common Yellowthroat -20%Golden-winged Warbler +18%Louisiana Waterthrush +173%Magnolia Warbler -44%Mourning Warbler +69%Nashville Warbler -45%Northern Parula +609%Northern Waterthrush -55%Ovenbird +12%Pine Warbler 58×Prairie Warbler +201%Tennessee Warbler -9%Wilson's Warbler -68%Yellow Warbler +7%
New World Sparrows Passerellidae
Old World Sparrows Passeridae
Cormorants Phalacrocoracidae
Woodpeckers Picidae
Gnatcatchers Polioptilidae
Owls Strigidae
Starlings & Mynas Sturnidae
Hummingbirds Trochilidae
Thrushes Turdidae
Tyrant Flycatchers Tyrannidae
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.