Fragile Inheritance
ecological change
in Canada
mission cray fish
Mission: Fragile Inheritance promotes and supports the long term study of species and habitats, human & environmental effects on them, and the conservation of biodiversity, based on the lifetime work of Fred Schueler & Aleta Karstad.

"Wow this is an awesome database! . . . it looks like the records have everything I am interested in."

Fragile Inheritance
6 St-Lawrence St
Bishops Mills Oxford Station
Ontario, Canada KOG 1T0
(613) 299-3107

Chorus Frogs

Mapping the range of Chorus Frogs (the Trilling Clade of Pseudacris) in western New York State was Fred & Aleta's first field work together, and soon after that Fred and his late brother Paul added Chorus Frogs to the known fauna of Vermont, but Chorus Frogs had always been ubiquitous in southern Ontario.

Through the 1990s the eastern Ontario and Bruce Peninsula populations rapidly declined, the Vermont population died out, and we hosted a conference on this decline in 2001. In 2006 Fred & daughter Jennifer went back to historic records across southern Ontario, and Isabelle Picard, Jean-Fran├žois Desroches, and Fred updated the COSEWIC report, documenting this decline in populations north and east of Guelph. The next year Emily Moriarty showed that the declining populations had the mitochondrial DNA of the northern & western Boreal Chorus Frog, Pseudacris maculata, though they had always been regarded as the "Western" or Midland Chorus Frog, Pseudacris triseriata.

In 2012 Fred & Aleta surveyed the northern limits of the range, documenting declines, struggling with spurious records based on trilling Peepers, and composing the song -

Our Chorus Frog work continues with Vance Trudeau's lab's work on understanding habitat, and establishing a captive population that can be used for reintroductions.

chorus frog painting

What can we do to increase awareness of habitat loss, invasive species, and human impact on nature?

There is no other independent organized group in Canada which is dedicated to promoting long term monitoring. This is your chance to support the work of Fragile Inheritance.

About the book...
a painter's ecology of glaciated North America

lavishly illustrated with watercolours and
descriptive prose from sea to sea
drawing the baseline for
a legacy of beauty and
change - Aleta Karstad
and Frederick W .
Schueler's life work