I’ve never heard them called crows nest before! But checked online and bird’s nest ferns are also referred to as crows nest. Wiki tells me: “Bird's-nest fern is a common name applied to several related species of epiphytic ferns in the genus Asplenium.” “Species known as bird's nest fern include:
A. nidus (bird's-nest fern)
A. australasicum (crow's-nest fern)
A. serratum (wild bird's-nest fern)”
@columbiariver Looks like it’s different to mine. Maybe nth hemisphere ? Looks this was labelled as Australian Swipe to see more pics of same plant. I never know wether to call them birds or crows. It’s in a 25mm pot inside a tub. Bit of water and out of the sun it just keeps giving.