A. COMMONER SPECIES
| I. Species normally arriving before April 1. | ||||||
| Name | Average date of arrival [1] | Arrival 1915 | Days later or earlier than average. | |||
| Chipping Sparrow | March | 7 | March | 19 | 12 | late |
| Yellow-throated Warbler | March | 24 | April | 7 | 14 | late |
| Blue-gray Gnatcatcher | March | 24 | April | 7 | 14 | late |
| Blue-headed Vireo | March | 25 | April | 1 | 7 | late |
| Pectoral Sandpiper | March | 25 | April | 13 | 19 | late |
| Louisiana Water-Thrush | March | 26 | April | 7 | 12 | late |
| Maryland Yellowthroat | March | 26 | April | 7 | 12 | late |
| Black-and-White Warbler | March | 27 | April | 6 | 10 | late |
| Black-throated Green Warbler | March | 27 | April | 10 | 14 | late |
| White-eyed Vireo | March | 31 | April | 9 | 9 | late |
| American Osprey | March | 31 | March | 28 | 3 | early |
| II. Species normally arriving from April 1 to 10 inclusive. | ||||||
| Tree Swallow | April | 3 | April | 13 | 10 | late |
| Lesser Yellow-legs | April | 3 | April | 13 | 10 | late |
| Barn Swallow | April | 7 | April | 13 | 6 | late |
| Green Heron | April | 9 | April | 14 | 5 | late |
| Parula Warbler | April | 10 | April | 15 | 5 | late |
| Whip-poor-will | April | 10 | April | 18 | 8 | late |
| III. Species normally arriving from April 11 to 20, inclusive. | ||||||
| Redstart | April | 12 | April | 12 | 0 | late |
| Yellow Warbler | April | 14 | April | 17 | 3 | late |
| Prairie Warbler | April | 14 | April | 12 | 2 | early |
| Yellow-throated Vireo | April | 14 | April | 13 | 1 | early |
| Spotted Sandpiper | April | 15 | April | 13 | 2 | early |
| Hooded Warbler | April | 16 | April | 10 | 6 | early |
| Crested Flycatcher | April | 16 | April | 24 | 8 | late |
| Red-eyed Vireo | April | 16 | April | 20 | 4 | late |
| Wood Thrush | April | 16 | April | 11 | 5 | early |
| Chimney Swift | April | 16 | April | 13 | 3 | early |
| Ovenbird | April | 17 | April | 9 | 8 | early |
| Summer Tanager | April | 17 | April | 11 | 6 | early |
| House Wren | April | 17 | April | 20 | 3 | late |
| Ruby-throated Hummingbird | April | 18 | April | 14 | 4 | early |
| Kingbird | April | 19 | April | 12 | 7 | early |
| Catbird | April | 20 | April | 21 | 1 | late |
| IV. Species normally arriving later than April 20. | ||||||
| Yellow-breasted Chat | April | 24 | April | 27 | 3 | late |
| Solitary Sandpiper | April | 24 | April | 13 | 11 | early |
| Orchard Oriole | April | 25 | April | 27 | 2 | late |
| Wood Pewee | April | 25 | April | 27 | 2 | late |
| Water-Thrush | April | 27 | April | 23 | 4 | early |
| Black-throated Blue Warbler | April | 27 | April | 21 | 6 | early |
| Green-crested Flycatcher | April | 30 | April | 21 | 9 | early |
| Bobolink | May | 2 | May | 3 | 1 | late |
| Indigo Bunting | May | 2 | April | 27 | 5 | early |
| Blue Grosbeak | May | 3 | May | 1 | 2 | early |
| Black-poll Warbler | May | 4 | May | 3 | 1 | early |
| Kentucky Warbler | May | 5 | April | 23 | 12 | early |
| Yellow-billed Cuckoo | May | 6 | May | 14 | 8 | late |
B. RARER SPECIES [2]
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[1] The average date of arrival was calculated from records made during the period 1884 to 1911 inclusive.
[2] This group includes species of which our records are too meager or too irregular to obtain an average as to time of arrival.
First Efforts at Bird Photography
By H. IRA HARTSHORN, Newark, N. J.
With photographs by the author