Vertebrate (Inventory)/Birds
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Revision as of 01:22, 26 April 2011
Contents |
Swallows
The Swallows subfield of the Vertebrate Birds section is used to record any observation of cave swallows.
Cave Swallows (hirundo fulva) usually nest just inside the entrance area of caves during the spring, summer and fall months. They rarely venture deeper than the twilight portion and are most active during the day. They prefer larger openings and high ceilings. Mud nests high on the walls and ceiling; feathers, twigs, grass and small broken egg shells on the floor; stains from droppings and noticeable chirping noises are all indications of swallows. When swallows are present, the signs are usually obvious and a musty smell or odor may be present. During the day, they can often be seen flying especially when silhouetted against the light from the entrance.
References
- Various (June 2004) Core Values Carlsbad Caverns National Park; as published by Bob Hoff: http://carlsbadcavernshistory.blogspot.com/2011/05/carlsbad-caverns-national-park-core.html
Swallows, Birds, Vertebrate
 Swallow egg shell, droppings, feathers, etc. |
 Swallow on a mud nest |
Owls
The Owls subfield of the Vertebrate Birds section is used to record any observation of owls in the cave.
Owls, if found, will almost always be just inside the entrance area during the spring, summer and fall months. They rarely venture deeper than the twilight portion. They usually leave the cave at night and occupy it during the day. They may hide in small cracks or between the folds of a drapery. Small, egg shaped droppings on the floor are an indication of owls. Owls may hiss when disturbed.
other
The other field of the Birds subsection should be used to record any observation of birds except swallows or owls.
Several types of birds can be found in Guadalupe Mountains caves besides swallows and owls. Turkey Vultures; Scaled Quail and other birds may occasionally be found from time to time. Most often they will be observed near an entrance; but, they could be lost or confused and might be found deeper in the cave. It is rare to see birds other than swallows in a cave; but, they do occasionally enter and may be observed.
See also
