==================================================================== | Number | Average | Average Plant | of | height of | height of | nests | plant | nest -----------------------------+--------+---------------+------------- _Ulmus americana_ | 4 | 7 ft. 6 in. | 2 ft. 3 in. _Maclura pomifera_ | 20 | 13 ft. 11 in. | 1 ft. 11 in. _Crataegus mollis_ | 1 | 11 ft. | 3 ft. 1 in. _Gleditsia triacanthos_ | 2 | 15 ft. 6 in. | 1 ft. 9 in. _Acer negundo_ | 4 | 8 ft. 9 in. | 2 ft. 5 in. _Cornus drummondi_ | 2 | 8 ft. | 2 ft. 8 in. _Symphoricarpos orbiculatus_ | 3 | 3 ft. | 1 ft. 10 in. | | | 7 | 36 | 11 ft. 4 in. | 2 ft. 3 in. -----------------------------+--------+---------------+------------- Selection of the first nest-site may take as long as two days, possibly owing to incomplete development of the nesting tendency, but more likely to a general lack of familiarity with the territory. Red-eyed Vireos require five to six days to choose the first nest-site (Lawrence, 1953:54). Later sites of the Bell Vireo are chosen in as little as three hours. Nest 1-c (1960) was abandoned at about 11:00 a.m. on May 14, 1960, when part of the thicket on the edge of which this nest was located was removed by brush-cutters clearing a power line right-of-way. By 2:00 p.m. this pair had begun construction of 1-d (1960) in an Osage orange 110 feet southwest of 1-c (1960). This particular site is of further interest because it is the same one utilized for nest 1-a (1960). In all, four instances of utilization of a nest-site a second time were recorded. Two-a (1960) and 2-d (1960) were built in the same fork; 1-c (1960) and 1-h (1960) were in the same tree, but not the same fork. It should be mentioned that 1-a (1960) and 2-a (1960) were abortive attempts that did not progress beyond the suspension apparatus. Nice (1929:16) recorded a similar instance of the re-use of a nest tree, but different forks were used.