Friday, May 3, 2013

Columbia Spotted Frog Eggs

Columbia Spotted Frog egg mass in the Columbia Valley near Brisco - by Larry Halverson
Hatchlings on top of egg mass by Larry Halverson
Females lay eggs in communal masses at the water surface, either freely floating or loosely tangled around emergent vegetation. You can tell that these eggs just hatched because the tadpoles have no eyes and the gills are visible.  The hatchling stage of clinging to the egg mass only last a day or two before they become tadpoles. 
Water temperature was 22 degrees C which likely why the hatching is earlier in the Columbia Valley than Kootenay National Park where the water temp was 0 degrees C on May 1.



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