Species Profile
Pine Siskin
Spinus pinus
Quick Facts
Conservation
LCLeast ConcernAlso known as: Pine Finch
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Appearance
The Pine Siskin is a small, streaky finch with a sharp, pointed bill.
Its brown-streaked body is accented by yellow edges on the wings and tail, most visible in flight. The bird has a short, notched tail and a somewhat flattened head profile.
Both sexes look similar, with males having slightly more yellow in their plumage. Juveniles resemble adults but may have less distinct markings and duller coloration overall.
Identification & Characteristics
Colors
- Primary
- Brown
- Secondary
- White
- Beak
- Grey
- Legs
- Brown
Markings
Streaked body, yellow-edged wings and tail
Tail: Forked and yellow-edged
Attributes
Understanding Attributes
Rated 0–100 based on research and observation. A score of 50 is average across all bird species. These attributes are relative and don't necessarily indicate superiority.
Habitat & Distribution
Pine Siskins inhabit coniferous and mixed forests across North America, from Alaska to the southern United States. They are also found in parts of Mexico and Guatemala. Their range extends into the boreal forests of Canada and high-elevation areas in the western mountains.
In winter, they may irrupt southward in large numbers, appearing in deciduous woodlands, suburban areas, and even urban parks across the United States and Canada.
Distribution
Diet
Pine Siskins primarily feed on seeds, especially those from conifers, alders, and birches. They also consume buds, tree flowers, and occasionally insects.
Their specialized bill allows them to extract seeds from tightly closed pine cones, giving them an advantage in coniferous habitats.
Behaviour
Pine Siskins are highly social, often seen in large, noisy flocks. They exhibit acrobatic feeding behaviors, hanging upside down on conifer cones or seed heads to extract seeds.
During the breeding season, males perform elaborate courtship flights, making wide circles while singing continuously.
Calls & Sounds
Pine Siskins are known for their high-pitched, buzzy calls, often described as a prolonged 'zreeee' or 'zree-e-e-e'.
Their song is a mix of warbles, twitters, and long buzzy notes, sometimes incorporating mimicry of other bird species. In flight, they make a distinctive 'tee-tee-tee' sound.
Nesting & Breeding
Pine Siskins typically breed from April to August, with timing varying based on location and food availability. Males court females with aerial displays and feeding rituals, often presenting food as part of the pair bonding process.
Nests are built high in coniferous trees, usually on a horizontal branch. The female constructs a cup-shaped nest using twigs, grass, and plant fibers, lined with soft materials like fur or feathers.
The female lays 3-4 pale blue-green eggs with brown spots. Incubation lasts about 13 days, with the female incubating while the male brings food. Nestlings fledge after 13-17 days but may depend on parents for several weeks.
Conservation
While currently listed as Least Concern, Pine Siskins face threats from habitat loss due to deforestation and climate change. They are also susceptible to salmonellosis outbreaks at bird feeders, highlighting the importance of feeder hygiene and responsible bird feeding practices.
Population
Estimated: 46,000,000 mature individuals[3]
Trend: Stable[2]
Population considered stable die to large population size, however long-term decline due to habitat loss and climate change
Elevation
Sea level to 4,000 meters
Additional Details
- Egg size:
- Approximately 1.5cm x 2cm
- Predators:
- Pine Siskins are preyed upon by various raptors, including Sharp-shinned Hawks, Cooper's Hawks, and Merlins. Small mammals like squirrels and chipmunks may also raid nests for eggs or nestlings.
- Alarm calls:
- Harsh 'zreeet' sound
- Breeding age:
- 1
- Maturity age:
- 1
- Feeding times:
- Throughout the day
- Major threats:
- Habitat loss, climate change
- Parental care:
- Both parents feed and care for chicks
- Primary calls:
- Rapid, twittering sounds
- Social habits:
- Flocks in winter, territorial during breeding season
- Egg appearance:
- Pale blue with fine, dark marks
- Feeding habits:
- Forages in trees, bushes and on the ground
- Breeding season:
- Late spring to early summer
- Diet variations:
- Diet changes with season and food availability
- Fledging period:
- Approximately 2-3 weeks
- Average lifespan:
- 5
- Call description:
- High pitched 'twee-twee-twee' and a repeated 'zreeet'
- Daily activities:
- Active during the day, feeding mainly in the morning and evening
- Nesting location:
- In trees, usually evergreens
- Number of broods:
- One to two
- Incubation period:
- About 13 days
- Nest construction:
- Small, compact cup of twigs, rootlets and grasses
- Migration patterns:
- Variable, moves southward in winter
- Migratory patterns:
- Irruptive migrant, moving with food availability
- Age related changes:
- Little known
- Prey capture method:
- Gleaning
- Conservation efforts:
- Protected under the Migratory Bird Treaty Act
- Territorial behavior:
- Defends nesting territories aggressively
- Reproductive behavior:
- Monogamous, returns to same nesting site each year
- Special dietary needs:
- Needs access to sources of calcium during breeding season
- Clutch characteristics:
- 3-5 eggs
- Interaction with other species:
- Usually in mixed flocks outside of breeding season
Birdwatching Tips
- Look for Pine Siskins in coniferous forests or mixed woodlands
- Listen for their distinctive, buzzy 'zreeee' call
- Check bird feeders, especially those offering nyjer or thistle seeds
- Observe their rapid, undulating flight pattern
Did You Know?
- Pine Siskins can survive in temperatures as low as -70°F (-57°C) by increasing their metabolic rates.
- They have a specialized pouch in their esophagus for storing seeds, allowing them to gather food quickly.
- Pine Siskins can form massive flocks during irruptive years, with groups numbering in the thousands.
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