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Sugar maple spotting slows as Canada's fall color fades
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Red oak spotting slows down as fall colors fade
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Milkweed sightings stay high across Canada as autumn sets in
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Invasive buckthorn sightings surge across Canada this week
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Pokeweed sightings dip slightly as fall observation seaso...
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This weedy wetland plant is everywhere on iNaturalist this week
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Eastern redcedar is having a moment on iNaturalist this week
iNaturalist:
Sugar maple spotting slows as Canada's fall color fades
iNaturalist:
Red oak spotting slows down as fall colors fade
iNaturalist:
This fuzzy forest moss is suddenly everywhere in Canada
iNaturalist:
Milkweed sightings stay high across Canada as autumn sets in
Mayflies and dragonflies share one ancient winged ancestor, DNA confirms
PubMed · 2026-10-12
Scientists analyzed DNA from 101 insect species to settle a long-running debate about how the first winged insects evolved, confirming that mayflies and dragonflies share a common ancestor and that wings evolved just once, around 380 million years ago.
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Analysis used 1,367 shared genes across genomes and transcriptomes from 101 insect species, including 16 newly sequenced mayfly genomes
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Genomic signal supports a monophyletic Palaeoptera (mayflies + dragonflies sharing one common ancestor) over the competing Chiastomyaria hypothesis
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Molecular dating places the origin of winged insects in the Early Devonian, with the mayfly-dragonfly lineage emerging in the Late Devonian