Northern Saw-whet Owl

Northern Saw-whet Owl

Aegolius acadicus Order: Strigiformes Family: Tytonidae

Overview

While many facilities recommend saw-whet owls as an “easy” or “beginner” owl, it is important to be extra vigilant with these small species that are more easily, albeit unintentionally, dominated. Despite their diminutive size and apparent ease of handling, in order to provide good welfare, experience working with owls and a strong foundation in training utilizing positive reinforcement should be a requirement for handlers working with this species.

To maximize lifelong welfare of an owl that is going to participate in ambassador animal programs, and as such be exposed to close contact with humans and a variety of stimuli that could otherwise be intimidating or inducive of unavoidable stress, it is recommended to hand-rear individuals slated to become ambassadors. Hand-rearing should occur during the formative stage of life, within the first few months of hatching. Hand-rearing owls allows the human caretaker to expose the owl from an early age to a variety of conditions it may encounter as an ambassador (crowds, vehicles, buildings, novel noises, etc.) while it is at the best stage to learn these stimuli are non-threatening, which generally helps them adapt to life under human care, in their roles as ambassadors, much more than parent-reared owls.

 

Natural History Information

Range and Habitat

Northern saw-whet owls are found only in North America. Their breeding range includes southern Alaska, southern Canada, most of the United States and some high elevation sites in central Mexico.

Longevity

In human care, saw-whet owls have lived as long as 16 years. In the wild, the longest known lifespan of a northern saw-whet owl was 7 years.

Ecosystem Role

Northern saw-whet owls impact the populations of small mammals that they eat.

Husbandry Information

Housing Requirements

Life Cycle Natural History Relevant Information

Temperature, Humidity, Light Cycles

Substrate:

  • This species can be successfully managed on a variety of substrates, such as pea-gravel, sand, dirt, grass.

Social Housing/Colony Management

Other General Housing Requirements or Management information

  • Multiple perching options are necessary to maintain good foot health.
  • Having a perching area which is high and also in the corner gives the bird a sense of security and mimics natural behavior of perching on a branch near a tree trunk. It is also important to have both sun and shade areas in the exhibit, as well as an area which is covered so the bird can remove itself from the elements if need be.
  • Most owls do well with some kind of box or small shelter in their enclosure.
  • Space should meet minimum USFW standards.
  • Enclosure be constructed with materials that reduce the possibility of damage to the feathers or to the owl itself (for example, bare wire mesh is less desirable than vertical bars or coated mesh).
  • Flight-capable individuals need flight exercise to maintain muscle mass.
  • A double door mew entrance is ideal for any bird of prey. This allows handlers to enter the enclosure safely and without incident.

Diet Requirements

Diet in the Wild

  • The northern saw-whet owl diet consists primarily of small mammals, particularly various species of mice and voles. Juveniles of larger mammals, including pocket-gophers, chipmunks and squirrels are occasionally taken, as are insects, such as beetles and grasshoppers. Small birds are also occasionally taken, primarily during migration when they are active at night.

Diet under human care

  • Mice, chicks, ducklings, quail, pinkies.

Veterinary Concerns

  • Individuals with compromised ability, i.e. wild injured, should be constantly monitored for changes in quality of life due to injuries.
  • When working with birds with limited vision, complete blindness in one eye, or missing an eye, these birds seem to be more sensitive (displaying anxious behavior) to lighting changes. They also may be more sensitive to people approaching them from the “bad” side.

Enrichment & Training

Enrichment

Behavioral Relevant Information

  • Raptors seize and rip apart their prey. Offering whole prey items, shreddable enrichment items, items they can grab and manipulate with their talons or shred with their beaks are all good forms of enrichment.

Environmental Enrichment

  • Changing perches within their habitat.
  • Addition of browse.

Behavioral Enrichment

  • The most successful enrichment devices appear to be items that can be footed and shredded, such as paper products, cardboard boxes, lettuce, melons, squash or other produce. These items can be provided alone or stuffed with prey or diet, although raptors should be monitored for ingestion of foreign objects if food is delivered with a novel item. Other successful items include tennis balls, holl-ee rollers, and canvas dog toys, which present opportunities for seizing, grabbing, mock “killing,” and mantling.

Schedule

  • Daily enrichment is recommended.

Other Enrichment Resources

 

Training

Behaviors Trained
    • Voluntary step-up to glove
    • Voluntary loading into crate
    • Voluntary scale
    • Voluntary nail trim
    • Calm behavior on glove

 

 

Reinforcers used & schedule of reinforcement
  • Using food and/or weight management as part of a good behavioral management program facilitates training by creating a learning environment in which owls want to participate. Training strategies that involve reducing food offered to the point of compromising the health of the bird are considered unacceptable. Food management and weight management practices that are safe for the owl and trainers, provide for the health and welfare of the owl, and facilitate training are recommended.
  • Food and or weight management should be done with an understanding of the process and considerations. The decision to use weight management should not be taken lightly nor undertaken at all by staff who do not have a comprehensive understanding of managing weight and diet.

Other

Colony or Breeding Management

  • Notes species is housed or managed socially or for breeding purposes.

Individual Identification

  • Dimorphism or practiced ways to individually mark species (such as those in colonies, like giant millipedes).

Programmatic Information

Messaging Themes

Wild owl populations face a multitude of threats; fortunately, there are a number of individual and community-level actions that people can take to help to protect owls in the wild. Some examples are listed below.

Pesticide and Rodenticide use:

As predators of rodents, all raptors, including owls, are incredibly vulnerable to rodenticide poisoning. Encourage responsibly use and properly manage rodenticides. Owls are also susceptible to pesticide biomagnification and mercury poisoning. Encourage people to avoid using pesticides on their lawns, and instead rely on native plantings or other environmentally responsible methods of pest management.

Human-Wildlife Interactions

Roadside litter is a threat to many owl species. Rodents are attracted to the litter, and a low-flying owl in pursuit of a rodent is vulnerable to a vehicular collision. Encourage visitors to dispose of their trash in an appropriate receptacle, not on the roadside, even if it is biodegradable. Owls are also susceptible to death through barbed wire or electrocution from power lines. We can help by supporting man-made barriers that keep birds away from high-electricity areas. Owls are highly sensitive nesters, and even slight disturbances can lead to abandonment. We can help by reducing activity in known nesting areas and avoiding owl nests when trimming trees or in forestry management.

Habitat Loss

Protecting habitat and supporting conservation organizations can help to protect populations of both predator and prey species.

Threats and Conservation Status

Global population estimates for northern saw-whet owls range from 200,000 to 600,000 individuals. Though population trends have not been studied, populations of northern saw-whets are probably declining slowly due to habitat loss. Starvation and parasites are documented causes of nestling mortality. Adults are frequently killed by collision with vehicles.

Northern saw-whet owls are protected under the U.S. Migratory Bird Act and CITES Appendix II. They are ranked as a species of least concern by the IUCN, and are not protected under the U.S. Endangered Species Act.

Interesting Natural History Information

Did you know…

Handling & Presentation Tips

  • Even though they are small, they are still a bird of prey, and extra care should be taken around their talons. Screech owl’s feet/talons are strong enough to puncture through a human fingernail. Gloves should be worn at all times.

Use Guidelines

  • This species may be presented on glove, on perch, or in free-flight demonstrations. For tethered presentation, whether that is to the glove or to a perch, attention should be paid to avoid bating. Bating is not something that should be accepted from owls, if there are instances of such, it is an indication of discomfort, with the handler or the situation, and that discomfort should be addressed, not ignored.

Pubic Contact and Interaction Guidelines

  • Public contact with this species is not advisable.
  • Touching is not advisable.

Transportation Tips

  • Transport box suggestions Raptor Rig and Varikennel.
  • A couple things to keep in mind, crates should not be carried by the handle, but rather using two hands on either side of the crate and supporting it adequately. Swinging transport crates around and or moving them on a bumpy cart may create negative association for the bird, due to an uncomfortable ride and decrease the likelihood that the bird will go in the box on future occasions. If the perch is to low for the bird, their tail feathers may get painted with fecal matter which does not look good on presentation. Varikennel you are able to adjust the height of the perch.

Crating Techniques

  • This species can be trained to voluntarily enter a crate either from the glove or directly from their enclosure. Continuous reinforcement of voluntary crate behaviors as well as dedication to their comfort and safety while in the crate is important to maintaining solid and reliable crate behavior.

Temperature Guidelines

Acquisition Information

This species can be readily acquired from wildlife rehabilitators. See:

Resources

 

 

 

 

 

 

 

Contributors and Citations

  • Jacque Williamson, Brandywine Zoo
  • Helen Dishaw, Jackie Kozlowski, Tracy Aviary
  • Kit Lacy, Cascades Raptor Center
  • Amy Fennell, Natural Encounters, Inc.

Comments from the Rating System

  • Henry Vilas Zoo: Size is VERY appealing; great for handling; still impressive to people despite small size

Top Photo Credit: credit the “header” photo of the species