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Montana Animal Field Guide

Montana Field Guides

American Tree Sparrow - Spizella arborea

  • American Tree Sparrow
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Global Rank: G5
State Rank: SNA

Agency Status
USFWS: none
USFS: none
BLM: none
CFWCS Tier: 3
PIF: none
 

General Description
Small species, sexually monomorphic. Grayish underside with a back streaked with black, cream, and brown.

General Distribution
Montana Range



Western Hemisphere Range

 


Summary of Observations Submitted for Montana
Number of Observations: 1094

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

Breeding
(direct evidence "B")

Breeding
(indirect evidence "b")

No evidence of Breeding
(transient "t")

Overwintering
(regular observations "W")

Overwintering
(at least one obs. "w")


 

(Records associated with a range of dates are excluded from time charts)



Migration
Bozeman area normal migration periods are from October 27 to December 20 and March 5 to 25. The spring peak is March 15.

Habitat
Found near tree lines, or open areas with scattered trees. Commonly winters in neighborhood gardens and feeders.

Food Habits
Diet includes spiders, seeds of grass, sedge, forbs, buds, and berries.

Reproductive Characteristics
Single brooded species with 3-5 eggs per hatch. Incubation period 12-13 days. Eggs pale-blue to greenish-white. Nests found on ground in shallow depressions; rarely in shrubs and low trees.

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Citation for data on this website:
American Tree Sparrow — Spizella arborea.  Montana Field Guide.  Retrieved on February 9, 2010, from http://FieldGuide.mt.gov/detail_ABPBX94010.aspx
 
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