| The edible nests of swiftlets are used in bird's-nest soup, a delicacy in some countries. |
|
| There is also a species of cave cricket in Borneo that feeds on both the young and eggs of swiftlets. |
|
| Their closest living relatives are swiftlets, tree swifts that can perch and the hummingbirds. |
|
| 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. |
|
| This is vital for animals who use a sightless navigation system such as bats, or birds like swiftlets who live in dark caves. |
|
| Bird's Nest actually refers to the nests that are built by small birds called swiftlets. |
|
| The cave is inhabited by hundreds of swiftlets that flit about in the dim light and nest in the darkness of the cave's upper reaches. |
|
| Swiftlets live and raise their young in remote caves on islands along the coasts of Vietnam, Singapore, Burma, Malaysia, Indonesia, and Thailand. |
|
| With one exception, all birds known to echolocate are swiftlets. |
|
