Leptospiral Agglutinins In Sera from Southern Illinois Herpetofauna

Abstract

vide the only wintering habitat for trumpeters on the Refuge. Mixed small grains (poured into the water) are provided twice each week to supplement the natural foods available to the swans, thus bringing the birds into close contact during the feeding periods. An estimated 600 adults and cygnets wintered in the principal districts of the tn-state 55 (Montana-Idaho-Wyoming) area in 1964.65; and, since there are movements of birds from one district to another, a major part of the trumpeter population of the United States (ex-