Diario de lynnwatson

http://www.inaturalist.org/observations/export

http://www.inaturalist.org/observations.csv?day=26&month=8&place_id=49955&year=2013&limit=200&page=1

http://www.inaturalist.org/observations.csv?day=26&month=8&place_id=49955&year=2013&limit=200&page=2

Not any particularly good ways. You can figure out when a taxon was first added to a project by searching for project observations and sorting by "date added," e.g.

http://www.inaturalist.org/observations/project/vermont-atlas-of-life?taxon_id=23783&order_by=created_at&order=desc

That will show you that http://www.inaturalist.org/observations/85957 by everett was the first Gray Tree frog added to the project.

New taxa by month is not currently possible, but you can see all the taxa for a particular month with a little URL hacking, e.g.

http://www.inaturalist.org/observations/taxa?projects[]=vermont-atlas-of-life&on=2014-08

http://www.inaturalist.org/check_lists/92970-Plants-of-Fort-Funston?missing_filter_taxon=211194&hide_ancestors=on&hide_descendants=on&missing_listing_list_id=96224&find_missing_listings=true

http://natureshutterbug.com/wordpress/2013/10/20/oso-flaco-lake-in-october/

There are many plants in flower, and hundreds of birds.