Pet safety
Is Bird's Nest Fern safe for cats and dogs?
Bird's Nest Fern is not listed by the ASPCA, but reputable horticultural sources treat it as safe for cats and dogs.
Considered safe
Bird's Nest Fern (Asplenium nidus) is not listed in the ASPCA database; this assessment follows reputable horticultural sources and errs on the side of caution. It is treated as safe for cats and dogs.
Why there is no ASPCA entry for Bird's Nest Fern
The ASPCA has no page for Asplenium nidus, the plant on this page. Two checks agree: the species appears nowhere in their dog, cat or horse lists, and a direct request for a bird's nest fern page returns nothing. There is no genus entry either. What the database does hold is one other spleenwort, Asplenium bulbiferum, filed under the title Mother Fern and listed as Non-Toxic to Dogs, Non-Toxic to Cats. That is a different species, so this page does not claim it as its own source. It is reassuring rather than decisive: no fern in the true fern families is listed as toxic anywhere in the database, and the safe verdict here follows that pattern together with reputable horticultural sources.
Do not confuse Bird's Nest Fern with Golden Birds Nest
Searching the ASPCA database for a bird's nest plant returns a result, and it is the wrong plant with the opposite answer. The entry titled Golden Birds Nest is filed as Sansevieria trifasciata, which is a snake plant, and it is toxic to dogs, cats and horses. The bird's nest fern on this page is an unrelated fern and is not in the database at all. Anyone who searches the name, finds that entry and stops reading will move a harmless fern out of the house while leaving the actual snake plant on the shelf. The ASPCA lists Golden Birds Nest (Sansevieria trifasciata) as Toxic to Dogs, Toxic to Cats, Toxic to Horses, toxic principle Saponins, with clinical signs: Nausea, vomiting, diarrhea. Read the ASPCA entry for Golden Birds Nest. If you are unsure which one you have, treat it as the toxic plant until you can confirm, and call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 if your pet has eaten any of it.
What this verdict does and does not mean
Being non-toxic does not mean a plant is chew-proof: even pet-safe houseplants can upset a cat's or dog's stomach if they eat a large amount, simply because it is plant matter. Most toxic houseplants cause irritant-level symptoms, such as drooling, mouth soreness, or a mild upset stomach, rather than a medical emergency. A small number of plants are a genuine emergency, most notably true lilies (Lilium and Hemerocallis species) for cats, which can cause fatal kidney failure from even a small amount of pollen or a nibbled leaf. If you are ever in doubt, or your pet has eaten part of a plant, call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435.
More on pet safety
Read the full care guide for Bird's Nest Fern, browse the pet safety checker for other plants, or identify a plant from a photo first if you are not sure what you have. Verdicts here follow the ASPCA toxic and non-toxic plant list.