Brittle bladder fern, leaves and sori. Underside of the fertile frond seems to have orange insect eggs on it.
A rather scraggly purple cliff-brake growing from mortar in a stone culvert.
Silvery glade fern. The "herringbone" soral pattern can be seen embossing the upper surface of the blade.
Along the road near Tucquan Glen
Stand of at least 30 trees
Slug on House Rock
Simple, ovate leaf with each lateral vein ending in a point. Leaf margin doubly serrate. Trunk and branches are characteristically muscular textured.
All along the stream at Trout Run
Small insect with ice blue legs and antenna.
Zebra swallowtail. Puddling along the side of the road at Erbs Mill. I don't see these very often, but the larval food plant, the pawpaw (Asimina triloba) is common in the lower Susquehanna valley.
Black rat snake? Very mellow. There was a recently shed skin nearby. Basking on schist outcrops by the railroad at the mouth of Tucquan Glen.
Mostly weft fern (Crepidomanes intricatum), but on the right side, you can see the thalloid gametophyte of Appalachian shoestring fern (Vittaria appalachiana) peeking out. Crevice in a large mica schist outcrop, Kelly's Run.
Gametophyte of weft fern, close up (the patch is somewhat larger than my thumbnail). In a sheltered crevice in a large mica-schist outcrop.
Gorge of Tucquan Creek, with thick understory of Rhododendron maximum. The cool, shaded microclimate of the gorge was very noticeable.
Mountain spleenwort. Growing on schist of Octoraro Formation, high ridge just south of mouth of Tucquan Creek. More or less frequent on rock outcrops in this area, and a parent of many of the F1 and tetraploid spleenwort hybrids in the area.
Growing in a crevice high in a large outcrop of Octoraro Formation schist.
This was out in the middle of the river so it was hard to get a sharp image. I took advantage when it flapped its wings. Correct me if I'm wrong but I believe its a juvenile Common Merganser?