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Hemlock woolly adelgid (Adelges tsugae) or HWA on eastern hemlock (Tsuga canadensis). Hemlock woolly adelgid is an invasive insect pest that kills hemlock trees in the eastern United States and Canada
Hemlock woolly adelgid (Adelges tsugae) or HWA on eastern hemlock (Tsuga canadensis). Hemlock woolly adelgid is an invasive insect pest that kills hemlock trees in the eastern United States and Canada

Hemlock woolly adelgid or HWA (Adelges tsugae), an invasive insect pest on eastern hemlock branches. Hemlock woolly adelgid infestations kill hemlock trees. Waxy white flocculence covers the bugs.
Hemlock woolly adelgid or HWA (Adelges tsugae), an invasive insect pest on eastern hemlock branches. Hemlock woolly adelgid infestations kill hemlock trees. Waxy white flocculence covers the bugs.

Hemlock woolly adelgid (Adelges tsugae) infests needles and branches of an Eastern hemlock tree (Tsuga canadensis). Hemlock woolly adelgid or HWA is an invasive insect pest killing hemlocks in the US.
Hemlock woolly adelgid (Adelges tsugae) infests needles and branches of an Eastern hemlock tree (Tsuga canadensis). Hemlock woolly adelgid or HWA is an invasive insect pest killing hemlocks in the US.

Asian Citrus Psyllid (Diaphorina citri) on Key Lime citrus plant in Key Largo, Florida. Asian citrus psyllid (ACP) is a citrus greening disease or Huanglongbing vector.
Asian Citrus Psyllid (Diaphorina citri) on Key Lime citrus plant in Key Largo, Florida. Asian citrus psyllid (ACP) is a citrus greening disease or Huanglongbing vector.

Spotted Lanternfly adult on tree of heaven leaf (Ailanthus altissima). Spotted Lanternfly (Lycorma delicatula) is an invasive species of insect with colorful spotted wings. The bug sucks tree sap.
Spotted Lanternfly adult on tree of heaven leaf (Ailanthus altissima). Spotted Lanternfly (Lycorma delicatula) is an invasive species of insect with colorful spotted wings. The bug sucks tree sap.

Poinsettia cyathia with tiny yellow true flowers surrounded by red bracts. Poinsettias (Euphorbia pulcherrima), in the euphorbia family, have flowers clustered into specialized reproductive cyathia.
Poinsettia cyathia with tiny yellow true flowers surrounded by red bracts. Poinsettias (Euphorbia pulcherrima), in the euphorbia family, have flowers clustered into specialized reproductive cyathia.

American Woodcock (Scolopax minor) walking on snow. The woodcock, or timberdoodle, is a plump long-billed shorebird that migrates in spring. Snow disrupts their camouflage. Central Park, New York City
American Woodcock (Scolopax minor) walking on snow. The woodcock, or timberdoodle, is a plump long-billed shorebird that migrates in spring. Snow disrupts their camouflage. Central Park, New York City

Spotted Lanternfly nymphs, red, black, and white on green Tree of Heaven plant. This invasive insect (Lycorma delicatula) is spreading in the eastern United States.
Spotted Lanternfly nymphs, red, black, and white on green Tree of Heaven plant. This invasive insect (Lycorma delicatula) is spreading in the eastern United States.

Brown Pelican with huge open beak and red throat pouch in La Jolla, California
Brown Pelican with huge open beak and red throat pouch in La Jolla, California

Beech Leaf Disease, linked to nematode worm Litylenchus crenatae, is a deadly new disease of American Beech (Fagus grandifolia) and other beech trees. Dark green stripes on beech leaves are a symptom.
Beech Leaf Disease, linked to nematode worm Litylenchus crenatae, is a deadly new disease of American Beech (Fagus grandifolia) and other beech trees. Dark green stripes on beech leaves are a symptom.

Spotted Lanternfly, closeup of nymphs. Red, black, and white bugs on green Tree of Heaven. This invasive insect (Lycorma delicatula) threatens crops and city street trees.
Spotted Lanternfly, closeup of nymphs. Red, black, and white bugs on green Tree of Heaven. This invasive insect (Lycorma delicatula) threatens crops and city street trees.

Asian citrus psyllid (Diaphorina citri) spreads citrus greening disease in citrus groves. Macro close-up of asian citrus psyllid insect on key lime leaf in Florida. Huanglongbing disease vector.
Asian citrus psyllid (Diaphorina citri) spreads citrus greening disease in citrus groves. Macro close-up of asian citrus psyllid insect on key lime leaf in Florida. Huanglongbing disease vector.