Migration Monitoring at TTPBRS- May 27-June 2

Mourning Warbler (TRCA-TTPBRS)

Following the hustle and bustle of mid-May, migration has been steadily winding down. The flycatchers, vireos and thrushes of late spring have been less abundant this year than in years past, perhaps owing to ideal conditions for nocturnal passage. Despite low numbers of migrants, the study area has been a very active place for birds with impressive numbers of nesting birds. On May 26, the explosive song of our third Connecticut Warbler of the spring was heard. Swainson's Thrush was the most common migrant recorded, followed by a smattering of flycatchers and warblers. Showers dampened the dry foliage at TTPBRS on May 27, when the 2nd station record of Orchard Oriole was spotted. Numbers of migrants picked up on the 28th as 61 birds were banded, and a late surge of Magnolia, Blackburnian and Black-throated Green Warblers was noted. The National Post visited the station for a feature story on this day. Marisol Ayala, a Masters student in the Environmental Studies Program at York University, spent the morning filming our work on the 29th. Marisol is working on an educational program to teach Costa Ricans about migratory bird conservation. The capture of two Silver-haired Bats on May 31st was unusual. The secretive Gray-cheeked Thrushes were well sampled by the nets this day as 14 were banded. South winds and high temperatures continued on June 1, with 32 birds banded, including the season's first Yellow-billed Cuckoo. Several Ruby-throated Hummingbirds, a total of 5 Mourning Warblers, and a very late Ruby-crowned Kinglet were standouts on an otherwise quiet June 2nd. The Spring 2007 Migration Monitoring Program will finish on Friday, June 8.


May 27
1-Philadelphia Vireo
1-Orchard Oriole (2nd TTPBRS record)

May 28
11-Swainson's Thrush
1-Indigo Bunting
8-Gray-cheeked Thrush
1-Black-billed Cuckoo
18-Red-eyed Vireo
5-Chestnut-sided Warbler
17-Magnolia Warbler

May 29
6-Wilson's Warbler
3-Lincoln's Sparrow
7-Eastern Wood-Pewee
14-Wilson's Warbler
1-Connecticut Warbler

May 30
126-Canada Goose
20-Swainson's Thrush
10-Blackpoll Warbler
1-Connecticut Warbler

May 31
4-Yellow-bellied Flycatcher
14-Gray-cheeked Thrush
14-Swainson's Thrush

June 1
1-Yellow-billed Cuckoo
2-Common Loon
1-Northern Shoveller

June 2
3-Northern Waterthrush
3-Ruby-throated Hummingbird
1-Ruby-crowned Kinglet (late)

Season Banding Total

Season Species Total