Posts

July 20, 2026 · Southwest Iberian Mediterranean sclerophyllous and mixed forests

Southbound waders arrive as Little Terns still breed

The first cohort of southbound migrants has touched down on the Tagus and Setúbal mudflats this past week—a compressed ecological moment when breeding and departure overlap. Dunlin, Curlew Sandpiper, Common Greenshank, a

July 20, 2026 · Shale Deserts and Sedimentary Basins

Monsoon flood pulse mobilizes selenium through impaired desert reach

In the span of two weeks, streamflow here surged from less than half a cubic foot per second — a channel barely alive — to 231 cubic feet per second, driven by summer monsoon pulses moving through the upper watershed. Th

July 20, 2026 · Flat to Rolling Plains

Pale Snaketail emerges in urban river under dissolved oxygen stress

Pale Snaketail dragonflies emerged this month along the South Platte River — a finding that carries weight in an urban waterway. These elegant damselflies (*Gomphus pallida*) require clean, well-oxygenated streams with g

July 20, 2026 · Piedmont Uplands

Systematic discharges push an already-impaired Potomac further from recovery

Two facilities operating side by side along the Potomac have been discharging pollutants at levels that dwarf their permitted limits — not occasionally, but as a sustained, unbroken pattern now stretching back more than

July 20, 2026 · Bay Terraces/Lower Santa Clara Valley

San Francisco Bay Rail nests as tides and toxics close in

The San Francisco Bay Ridgway's Rail (*Rallus obsoletus obsoletus*) is calling from the pickleweed marshes along the bay edge this week, a sound that carries far across the Palo Alto Baylands during the height of breedin

July 20, 2026 · San Francisco Peninsula

Humpback whales return to peak summer feeding in Peninsula waters

Humpback whales (*Megaptera novaeangliae*) are feeding in the waters just off the Peninsula right now — **44 occurrences recorded in the past two months** mark this as the peak of their annual summer residency here. They

July 20, 2026 · Connecticut Valley

Two long-missing bumblebees return to the valley in July

Golden Northern Bumble Bees and Yellow-banded Bumble Bees turned up in the valley this week — confirmed in Hadley on July 14 and Colebrook on July 15 — working native wildflowers as they came into bloom. Both species wer

July 20, 2026 · Boston Basin

MBTA's Everett rail yard chlorine keeps fouling impaired waterways

A persistent chlorine discharge violation at the Everett Shops MBTA rail maintenance facility has now stretched across two full years, with seven documented exceedances between 2024 and 2025 and a reading taken just thre

July 20, 2026 · Gulf of Maine Coastal Lowland

Tides running eight inches high push salt marsh into stress

Since mid-July, tides here have been running roughly eight inches — about 0.2 meters — above predicted levels, pushing the salt marsh edges into deeper flooding than the seasonal calendar would suggest. At this time of y

July 20, 2026 · Fraser Lowland

Dot-tailed Whitefaces return to Sunset Pond in June

Dot-tailed Whitefaces (*Leucorrhinia hudsonica*) emerged at Sunset Pond on June 20—small dragonflies marked by a single yellow spot at the tail tip of the males, now winging across the emergent vegetation. These odonate

July 20, 2026 · Triassic Lowlands

Black tupelo turns color in mid-July, signaling heat stress

Black tupelo trees are showing autumn color in mid-July — a full two months ahead of their normal September scarlet display. This premature flaming is not a gift of an early fall, but a distress response. When water stre

July 20, 2026 · Front Range Fans

Nitrogen spikes twice in four months at Niwot plant

The Niwot Sanitation District wastewater plant exceeded its permitted nitrogen discharge limit for the second time this year three days ago, releasing inorganic nitrogen at **45 percent above the allowed threshold**. The

July 19, 2026 · Cross Timbers Transition

Dissolved oxygen plummets toward critical fish-kill threshold

Dissolved oxygen has dropped to 2.8 mg/L — **the lowest reading in six weeks of mounting hypoxia, and barely above the threshold where fish kills accelerate**. At tonight's water temperature of 26°C, a single calm night

July 19, 2026 · Eastern Florida Flatwoods

Atala butterfly returns to flatwoods after 60-year absence

An Atala butterfly appeared in the flatwoods this July—one of 16 threatened species logged this month. This metallic blue-and-red beauty had vanished from nearly all of Florida by the 1960s, a casualty of harvest pressur

July 19, 2026 · European Atlantic mixed forests

Old World Swallowtail finds breeding grounds in Brussels

Old World Swallowtail (*Papilio machaon*) has appeared twice in the city this summer — once at Laeken on July 15, again near Chapelle on June 27 — suggesting that breeding may now be underway in urban Brussels rather tha

July 19, 2026 · Celtic broadleaf forests

Tides 42 cm above predicted, squeezing shorebird foraging windows

Low atmospheric pressure is driving tides 42 centimetres above their predicted levels, compressing the exposed mudflats just as shorebird chicks are fledging and most dependent on access to shallow feeding grounds. The p

July 19, 2026 · Central Florida Ridges and Uplands

Dusky Herpetogramma moths peak during July rains

Dusky Herpetogramma moths are at peak abundance this July, with 20 sightings recorded — more than any other species in a recent 100-plus moth flush across the scrub ridges. The timing is no coincidence: these nocturnal i

July 19, 2026 · Los Angeles Plain

July drought exposes Ballona Creek's cascading failures

July is the month when Ballona Creek — its estuary and wetlands — shows the full cost of being a federally impaired system. Low flows concentrate whatever water remains; heat strips away dissolved oxygen; and **nineteen

July 19, 2026 · Clayey High Lime Till Plains

Unhealthy air arrives during peak nesting season

Air quality hit unhealthy levels today—PM2.5 climbing to AQI 110—at precisely the moment when breeding birds are metabolically stretched to their limit. Nestlings demand constant feeding, and parents must spend their day

July 19, 2026 · Hudson Valley

Streamflow plummets, but groundwater keeps water cool

Streamflow has dropped to drought levels—only seven cubic feet per second now—yet the water temperature has fallen sharply to 17°C, down from a trout-stressing 22°C just two weeks ago. The shift marks a critical transiti

July 19, 2026 · Southwestern Florida Flatwoods

Swallow-tailed Kite returns to breeding season roosts

A Swallow-tailed Kite appeared July 19, moving through the tall pines in the height of breeding season. Pairs are deep in the work of tending nestlings now, soon to gather in communal roosts as the summer progresses. Th

July 19, 2026 · Narmada Valley dry deciduous forests

Indian Grey Hornbill arrives as figs ripen in monsoon

Indian Grey Hornbill sightings on July 18 coincided with peak monsoon fruiting — sacred figs and cluster figs now ripening across the city. The birds are drawn to this abundance not by accident; hornbills and figs have e

July 19, 2026 · Monongahela Transition Zone

Giant mayflies emerge from the Hocking River

Giant mayflies (*Hexagenia* species) emerged from the river this week in a quiet act of ecological recovery. Their nymphs spend years in the riverbed before crawling to the surface to metamorphose — a transition only pos

July 19, 2026 · Lansing Loamy Plain

Forty dischargers in violation as summer oxygen crashes

Midsummer brings the year's most perilous moment for stream ecosystems here: water temperature peaks, dissolved oxygen plummets, and excess nutrients from forty permitted dischargers are running in significant violation

July 19, 2026 · Southern New England Coastal Plains and Hills

Comet Darner spotted despite widespread water impairment

Comet Darner (*Anax longipes*) — North America's largest darner — turned up in the park on July 14, perched along the water's edge in the midday heat. These elegant, long-bodied insects are indicators of clean, healthy a

July 18, 2026 · Ontario Lowlands

Hermit Flower Beetles emerge from their secret lives in rotting wood

Hermit Flower Beetles (*Osmoderma*) made a rare appearance above ground in July — a fleeting two-beetle emergence marking the culmination of years spent hidden inside the heartwood of ancient trees. These saproxylic spec

July 18, 2026 · Worcester/Monadnock Plateau

Copper discharge threatens mussels during summer low flow

The Milford wastewater treatment plant released **copper at nearly double its permitted level** last quarter — marking the second consecutive violation for the facility. The timing is particularly acute: summer low flows

July 17, 2026 · Laramie Basin

Swainson's Hawks return to nesting grounds after pesticide crisis

Swainson's Hawks are nesting across the sagebrush basin again — eight sightings since June mark a quiet but significant return. The presence of breeding birds here is a measure of hard-won recovery from the 1990s, when *

July 17, 2026 · Whitewater Interlobate Area

Twenty-five moth species at a late-June blacklight

Over 25 moth species appeared at a late-June blacklight in the gorge — North American Luna Moth, Giant Leopard Moth, Sycamore Tussock Moth, and Painted Lichen Moth among them. The larvae of most of these species are spec

July 17, 2026 · South Deccan Plateau dry deciduous forests

Tasar Silk Moth spotted in monsoon flush across Bengaluru

Tasar Silk Moth sightings in Koramangala this week mark part of a broader lepidopteran pulse across the city—35-plus moth and butterfly species have been recorded in the monsoon rains. The caterpillars of the Tasar moth