Varied Thrush

Ixoreus naevius Gmelin

 

 

 

Field Guide IDs:
NG-350; G-246; PE-220; PW-pl 48; AW-pl 444; AM(III)-60


Nest
Location
Nest
Type
Eggs &
Mating System
Dev. &
Parental Care
Primary &
2ndary Diet
..
Foraging
Strategy
F
I: 14? DAYS
ALTRICIAL
9 - 25 feet
F
3-4
(2-5)
MONOG
F: ? DAYS
MF
FRUIT
FOLIAGE
.....GLEAN

BREEDING:

Moist coniferous forest and deciduous forest with dense understory. 2? broods.

DISPLAYS:

Agonistic: head extended forward with body held in horizontal crouch, plumage sleeked; at highest intensity, tall lifted and spread, wings spread and rotated forward.

NEST:

Usu against trunk in small conifer; bulky, of mud, dried leaves, inner bark strips, soft moss, reinforced with twigs, lining of grass or rootlets.

EGGS:

Pale blue, flecked with brown. 1.2" (30 mm).

DIET:

Includes sowbugs, myriapods, snails, worms; much fruit, weed seeds, and acorns in winter. Young probably fed exclusively animal diet.

CONSERVATION:

Winters s to n Baja.

NOTES:

Song is an eerie, bell-like, prolonged whistle that slowly fades away from the listener. Breeding biology not well known. Aggressive toward other species at winter feeding sites.

STANFORD. NOTES:

Fairly rare to uncommon resident from fall through spring. Occurs in a number of areas on campus, usually in more heavily vegetated areas than those used by the similar American Robin, although it is often found in flocks of robins. A few can be found near the Mausoleum in winter.

ESSAYS:

Feeding Birds; Bathing and Dusting; How Do We Find Out About Bird Biology?

REFERENCES:

Martin, 1970.

Except for Stanford Notes, the material in this species treatment is taken, with permission, from The Birder's Handbook (Paul Ehrlich, David Dobkin, & Darryl Wheye, Simon & Schuster, NY. 1988).