No, they are not poisonous.
Yes, black crickets are in fact poisonous to frogs. Frogs should never be feed these type of crickets. However, regular green colored crickets are OK for a frog.
No the coleus leaves are not poisonous to cats.
Beetroot leaves are not poisonous to cats. However, cherry leaves and peach leaves are poisonous and harmful for a cat to ingest.
Yes, Maiden Grass (Miscanthus sinensis) is poisonous to cats but, it is only the roots of the plant that are poisonous to them.
California poppies are poisonous to cats. Additional plants poisonous to cats include rhubarb, poison oak, foxtail, and the fruit salad plant.
Polyethylene glycol is not poisonous to dogs and is often found in dog foods. However, it is poisonous to cats.
Anchovies are not poisonous to cats. Most cats can eat any type of seafood, except for starfish and oysters, which can be harmful.
The Tropicana plant is not poisonous to cats. However, the Stinging Nettle, Tobacco, Jimson Weed, and Lily of the Valley is poisonous.
The Iris plant is poisonous to cats, and should be avoided.
Nasturtiums aren't poisonous for cats, so they are fine for cats to eat. There are some poisonous plants, but nasturtiums aren't one of them.
Dandelions may be weeds but they are not poisonous for cats. If your cat pounces on one and eats the leaves, they will be fine.