Lanius
ludovicianus
(Loggerhead Shrike)
Physical
Description:
8-10" (20-25 cm). Gray
crown extends down back of neck
and shoulders. Black mask; white cheeks and throat. Black wings and tail edged
with white. Light gray below. Juvenile barred on underparts.
Similar Species- Northern Shrike, Northern Mockingbird
Song:
Song
is a series of coupled phrases: chereep-chereep. Calls include a creaky zeeet.
Distribution:
Breeds
across portions of Canada, south through Great Basin to Baja California, Mexico,
Gulf Coast, and southern Florida. Winters in southern half of breeding range,
south to Gulf Coast, southern Florida, and Mexico.
Habitat:
Found in open country with scattered trees
and shrubs, in savannas, desert scrub and, occasionally, in open juniper woodlands.
Often found on poles, wires or fenceposts.
Diet:
Feeds primarily
on insects, small birds, lizards, and rodents. Diet varies with season and location;
in parts of range, 76% of food eaten in winter may be meat.
Ecology:
Constructs bulky, cup- shaped nest
in shrub. A study in southeastern Idaho located nests in sagebrush, bitterbrush,
and greasewood. Most nests were in sagebrush, and a lower than expected nest
height was observed in all shrub species. Species hunts from perch, or catches
prey in mid-air. Territorial throughout year. Size of territory may be about
6 ha in grassy hills; 10-16 ha in semi-desert. May maintain separate breeding
and winter territories. Idaho study indicated that shrikes directly lowered
nesting success of Sage and Brewer's Sparrows and Sage Thrashers. Loggerheads
are one of 3 shrub-steppe neotropical migrants declining in Idaho. Shrike species
throughout world are thought to be declining.
Conservation:
Element Code: | ABPBR01030 |
Status: | Protected nongame species |
Global Rank: | G? |
State Rank: | S3,NTMB |
National Rank: | N5 |
Important
State References:
Woods, C.P. and T.J. Cade.
1996. Nesting habits of the loggerhead shrike in sagebrush. Condor 98:75-81.