Digestion of DNA from blood (1–4) and tissue (5–9) samples on FTA paper. Samples were crested pigeon (1), chicken (2), cow (3), sleepy lizard (4), Mallee fowl (5), frog (6), yabbie (7), abalone (8) and blue crab (9). Samples were processed, and digested overnight with AluI Fish blood samples. 1 mm and 5 mm discs from King George Whiting blood and tuna blood were processed, and digested overnight with AluI. A 1 mm disc yields less DNA than in birds, and a 5 mm disc yields incompletely digested DNA.