September 23rd, the first day of fall, saw an orange capped warbler in my West Philadelphia back yard. http://www.allaboutbirds.org/guide/orange-crowned_warbler/id
For the past two weeks, there were blue-winged wasps (Scolia dubia) in the grassy area along Ridge Ave at the Wissahickon train station – yesterday (23d of September), there were none.
There are three callery pears (Pyrus calleryana) flowering today on Water Street just above Dickinson.
Near the mouth of the Wissahickon, just downstream from the entrance to Forbidden Drive, saw Impatiens capensis and Impatiens pallida (also called jewelweeds), right next to each other in a common patch, both in fruit and both in flower
Saw: woolly alder aphids (on European alder – Alnus glutinosa) today in alder stand near Cobbs Creek golf course (in Haddington Woods). There were ants with the aphids. (sooty mold, too)
Saw a dead Imperial Moth Caterpillar being consumed by ants on a
path by Memorial Hall in W. Fairmount Park Saturday 9/20/14.