| The nests are white and translucent and can be found wherever colonies of swiftlets are breeding, in caves, on cliffs or sometimes on a building. |
| Bird's Nest actually refers to the nests that are built by small birds called swiftlets. |
| This is vital for animals who use a sightless navigation system such as bats, or birds like swiftlets who live in dark caves. |
| The edible nests of swiftlets are used in bird's-nest soup, a delicacy in some countries. |
| Their closest living relatives are swiftlets, tree swifts that can perch and the hummingbirds. |
| There is also a species of cave cricket in Borneo that feeds on both the young and eggs of swiftlets. |
