Yes they are, along with many others. For some reason they are more toxic to cattle and domestic animals. I have them and also have been able to enjoy the wildlife. You would think that the birds would eat the seed but they do not, I do not recall in 6 or more years ever seening a nibble on my plant.
Let me warn you, Wisteria, the seed, pods and wilted leaves will really cause you problems with cattle. First hand experience!

I've never had the daturas, moon vine or brugs snacked on by critters but the insects seem to have no problem. Last year someone (raccoon I think) did eat datura seeds, the only reason I know this is that I found a deposit of scat right outside our deck doors, it was loaded with datura seed, the muddy paw prints told me it was a masked bandit. I think he survived the experience tho I am quite sure he had a very sick tummy from the look of the gift he left behind.

Hey there! I have dats and cats and we live in Columbus. I don't think this is something cats would snack on. In fact, there is no damage at all to the plants even though the bugs have gone a little crazy this year.

My cats eat grass and catmint - nepeta. They seem to know what to stay away from. It's still a good idea to thoroughly research the subject on line so YOU feel comfortable with growing datura.

Good luck and let us know what you find out.

I think that wild animals have an instinct about what they can and cannot eat. My domestic rabbit, Floppsie and her 5 babies are let out every evening to browse, I have several poison plants and they never touch them. Wonder if the Mom teaches them, or just instinct? I also have chickens that are turned out to forage and they don't eat the poison stuff either, niether do the dogs or my neighbors cats. Ever wonder how a squirrel knows which side of a Buckeye nut to eat? One side is poison, the other side is not. Go figure:) I was raised on a dairy farm and a cow will eat anything, as far up into an oak tree as she can reach even. Ever had to drink wild onion milk? YUCK, just awful. I was raised in Florida on a dairy farm and we always had to go out and pull up Datura out of the fields. A wild weed back then, I always thought how can something so beautiful be so deadly. My Moma would watch us like a Hawk that none of us put our hands in our mouths after handling one. Now everybody wants them, shoot I knew they were gorgeous when I was just 5.:)

I have a small domestic dog that seems to snack on the moon flowers. What are some symptoms of sickness associated with this?

you would expect them to have difficulty drinking, they salivate heavily, stumble and eventually if the intake is enough have a croup like cough thus leading to respiratory distress and death. Hope yours do not get enough of them to cause this. No problems with the Dats at my house but we have had problems with other plants.
Good luck!

Koles, I love Daturas! The native wild one most common, is D. stramonium, better known as jimsonweed. I worked on a farm in north central Kansas some 13 years ago, and asked about spraying these toxic plants. The farmer told me to just leave them alone. For some odd reason, his cattle were repulsed by the scent and flavor of healthy jimson, but he had sprayed some many years earlier and the breakdown of the affected plants attracted some cattle to eat them. He lost 2-3 head, but others just got sick.
Manduca hornworms will eat Daturas with enthusiasm, but they will also eat potato leaves, black [deadly] nightshade and other species of Solanaceae. Go figure.

I thought Moonflower & Datura/Jimsonweed were two different plants?

Jill, a jimson weed is a Datura, but not all Dats are jimsons. Most people have Datura inoxia or D. metelloides planted as an ornamental, which has flowers at least 2-3x larger than the wild jimson. Actually, I think the gray-leafed cultivated Datura or moonflower is a native plant, too.

Jill, to add to the confusion about moonflowers, there is a VINE called a moonflower. I sometimes get confused about which thing someone is talking about unless they mention that they are talking about the vine. I grow both now, but 'moonflower' meant vine to me for years, before I heard about Datura.

When my Golden ingests Morning Glory she vomits within 30 seconds, like clockwork. I have to keep the vines trimmed above the fence to prevent her from nibbling (my neighbor planted it years ago). It is highly toxic and can be fatal. Thank goodness she throws up. I read that this is also true of the Moon Flower vine.

I have witnessed wasps being attacked to myoonflower plant in my window and what I have noticed is that the wasps will eat/nibble on the vine/leaves and then minutes later they act slow disoriented and aggressive when you get near them but they do not know which direction to go when they are being bothered. That to me is strange because wasps usually attack vibrations movements and noisey objects but these wasps do not seem to be aware of where they are and which way they are going. They just hang out for awhile and either recover and go on or die. Just my observation I have seen three wasps do this one died the other two I can't say if they died or not they just remained still and I assumed they died late on.