Vilella and Nimitz • RED-TAILED HAWKS IN THE LUQUILLO MOUNTAINS 
763 
TABLE 2. Distance from trap sites and weekly movements of Red-tailed Hawks in the Lut|tiillo Mountains, Puerto Rico. 
Bird ID 
Gender 1 
Age” 
Max D‘ (ml 
B-MWM' 1 (m) 
NB-MWM' (in) 
MWM 1 (m) 
1 
U 
AHY 
6.875 
3.263 
3,058 
3.481 
2 
U 
AHY 
7.348 
2.119 
2,1 19 
4 
F 
ASY 
8.881 
1.595 
1.913 
1.652 
5 
M 
ASY 
6,454 
2.048 
1.580 
2.166 
6 
M 
AHY 
9.629 
3,730 
2,095 
2.599 
7 
F 
AHY 
17.490 
4.573 
5.039 
4.651 
8 
F 
AHY 
10.248 
2.906 
2,873 
2.975 
9 
F 
AHY 
16.008 
2.327 
1.312 
2.090 
12 
F 
HY 
8.014 
3.028 
3.258 
13 
M 
HY 
39,942 
6.791 
6.782 
6,705 
14 
F 
HY 
8,089 
3.758 
3.628 
15 
F 
ASY 
16.576 
5.090 
5.090 
16 
F 
AHY 
8.096 
3.754 
3.819 
17 
M 
AHY 
8.818 
2.073 
1.954 
18 
M 
ASY 
15.308 
3.967 
3.967 
19 
F 
ASY 
12.066 
4.085 
4.085 
20 
M 
HY 
5.179 
2.286 
21 
M 
HY 
5.276 
1.188 
22 
F 
HY 
3.194 
1.470 
23 
F 
HY 
1.959 
877 
24 
F 
HY 
2,104 
919 
“ Gender: U 
= unknown, F — 
female. M = male. 
Age: HV = hatch-year, AHY = after-hatch year, ASY after-second year, 
j Maximum distance front trap site. 
Breeding season mean weekly movement. 
, Non-breeding season mean weekly movement. 
Annual mean weekly movement. 
limes grealer than territory si/.es reported by 
Boal et al. (2003), a difference we attribute to 
the benefits of radiotelemetry. Territory sizes of 
Broad-winged Hawk pairs measured by spot 
mapping (74.3 ha) in the Rio Abajo Forest of 
north-central Puerto Rico were considerably 
smaller than home range estimates (213.1 ha) 
obtained from radiotelemetry (Vilella and 
Hengstenberg 2006). Radiotelemetry generates 
improved estimates of animal space use com¬ 
pared to visual estimation techniques (i.e., spot 
mapping) because individual birds can be 
tracked and observed continuously below or 
above the canopy over extended periods of time. 
However, most estimates of home range size for 
neotropical raptors with few exceptions (Valdez 
2009) have relied on territory mapping and 
ground surveys, not radiotelemetry (Mader 
Table 3. Distance between centroids and core area shifts from breeding to non-breeding season for six Red-tailed 
Hawks in El Yunque National Forest, Puerto Rico. 
Bird ID 
Gender 
Age” 
ST 
D1STT 
DIST2” 
DIST3 r 
4 
F 
ASY 
P 
422.5 
699* 
569* 
5 
M 
ASY 
P 
1.750.7* 
1,385* 
367 
6 
M 
AHY 
P 
1.013.1 
8 
F 
AHY 
P 
276.8 
9 
F 
AHY 
P 
87.3* 
13 
M 
HY 
N 
6.265.2* 
Gender: F = female. M = male. 
Age: HY = hatch-year, AHY = after-hatch year. ASY = after-second year. 
Status: P = paired, N = not paired. 
GIST I = distance (m) 2001 breeding season centroid to 2002 non-breeding season centroid. 
D1ST2 = distance (tn| 2001 non-breeding season centroid to 2002 breeding season centroid. 
DIST3 = distance (in) 200! breeding season to 2002 breeding season centroid. 
" Significant core use area shifts estimated by Multi- Response Permutation Procedure. 
