Does natural trapping of toads and frogs count as somthing the Society of Prevation of Cruelty to Animals will care about? Because on page 105 of the book savage garden, third paragraph from the top, you'll see this:
"That the plants do catch larger animals, such as the Pacific tree frog, is something that I have witnessed amoung my greenhouse plants many times."
You may or may not also know that most frogs and toads never even reach adulthood, where they become fertile... Being found in an urban location, there is very little chance that that frog that was used to benefit another living thing would have lived to see its own eggs...
It is also reported that tadpoles and baby fishies are eaten by utricularia, in a rather greusome way:
"The biggest prey include newly hatched fish fry and tadpolettes."
The tail gets sucked in, and is digested. When the trap is reset, the tadpole wiggles away, only to reset the trap and have another chunk taken out of it... (The Savage Garden, p222)
A blue bottle fly can lay as many as 600 eggs at once. By you slaying of them for the sake of your plant, look at how many new living Diptera you have prevented from ever seeing the light of day.
On a personal note... I find it offensive that you ask for seed so blatantly...
I won't continue this any longer... I dont see it to be necassary... Do you?