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~ a • <br /> <br /> starts (Table 3). Nesting success was the highest on the DNM <br /> area compared to the other 3 sites for: percent of nests fledging <br /> young, number of young hedged per successful nest, and number of <br /> young fledged per nest attempt (Table 4). In all three <br /> parameters this difference was not significant (P > 0.05) <br /> compared to nests on the Front Range of Colorado or in Idaho but <br />differed from North Dakota nests (P < 0.05). Only young Kestrels <br /> were banded in this area due to nest checks being made later in <br /> the season; 52 birds were banded (24 females and 28 males). <br /> <br /> Table 4. Nesting prpductivity of American Kesvek on the Integrated Pest Management Demonsvation <br /> Areas and Mormon QirJtet control azeas during 1988 <br /> <br /> Repr uctm Co or Co orado I o North <br /> parameters Front Rance DNM Dakota <br /> N <br />16 17 27 35 <br /> est attempts <br /> Qutch size 43 3.7 43 43 <br /> ° <br /> % nests hatched <br />88 88 85 63 <br /> Hatchlings/nest 3.6 33 33 2.1 <br /> °~G, nests fledgedb 81 ffi 81 51 <br /> No. fledged/successful nest 3S 38 33 3.1 <br /> No. fledged/nest attempt 29 3.1 27 1.6 <br /> Hatch nests: tl egg [ <br /> bFledged nests: tl young fledged. <br /> Idaho <br /> Initiation of Restrel egg laying started as early as the <br /> first two weeks in April and ended in early July with the peak <br /> occurring in the second half of May (Table 3). Nesting <br /> productivity was good for the Idaho area with 2.7 young fledged <br /> per Restrel nest attempt (Table 4), although this is slightly <br /> below the 2.88 young fledged per nest attempt necessary for a <br /> stable population (Henny 1972). Thirteen adult Kestrels (8 <br /> females and 5 males) and 73 young (42 females, 28 males and 3 of <br /> unknown sex) were banded during the first year. <br /> Food remains were visually checked in 22 Kestrel nests with <br /> insects (grasshoppers and beetles) being found. in 82~ (Table 5). <br /> The insect proportion of the contents ranged from 5 to 100$. The <br /> next most commonly occuring food item was reptiles (50$); the <br /> most common reptile was a species of Horned Lizard (Phrynosoma). <br /> All but 1 of the nests with reptiles had the Horned Lizard <br /> present and the other nest contained an unknown snake. These <br /> estimations reflect food utilization for the entire nesting <br /> 6 <br />