In addition to many annual Arbor Day celebrations in Groton, MA, past Batraxoi concerts have included:

Weep with those who Weep: a Requiem (October 2016, Mason, NH and Cambridge, MA)
Ruwth (October 2014, Mason, NH and Cambridge, MA)
Sarai (October 2013, Mason, NH)
Yona (April 2011, Mason, NH)
A Cradle for the Child (January 2011, Mason, NH)
A Cradle for the Child (December 2010, Mason, NH)
The Midwife of Bethlehem (January 2010, Mason, NH)
The Midwife of Bethlehem (December 2009, Mason, NH)
The Christmas Letter (December 2008, Mason, NH)
A Birth in the Family (December 2007, Mason, NH)
A Dot was the Star (December 2006, Mason, NH)
The Christmas Dance (December 2004, Mason, NH)
That Open World (December 2003, Townsend, MA)
Sweet was the Song (December 2002, Groton, MA)
The Friendly Beasts (December 2001, Mason, NH)
Songs for St. Martin's Day (November 2001, Groton, MA)
Make our Seasons Welcome Here (December 2000, Mason, NH)
Christmas is my Name (December 1999, West Concord, MA)
A Clear Night, A New Song (December 1998, Nashua, NH)
To Look with Wonder (December 1997, Groton, MA)
Ivory and Gold (December 1996, Mason, NH)
The Stonecarver's Rose (December 1994, Mason, NH)
In the Wilderness (October 1994, Mason, NH)
The Song of Joel (June 1992, Mason, NH)
The Song of Miriam (June 1990, Mason, NH)
The Song of Simeon (December 1988, Mason, NH)
Psallite (December 1986, Mason, NH)
Welcome Yule (December 1983, Hollis, NH)
Glad Tidings of Great Joy (December 1981, Pepperell, MA)
English Medieval to German Baroque (November 1981, Pepperell, MA)
Angelus ad Virginium (December 1980, Pepperell, MA)