Aphids under a leaf. There are a few adults and many nymphs. One adult is winged. There are also two "aphid-lions" - larvae - each feeding on an aphid nymph. Many of the aphids are lined up along the main vein of the leaf - or an offshoot of the main vein - feeding.
Leafhopper on an alder
A species of Flat Bug, a family of the so-called "true bugs." It feeds on fungi.