Evening Republican, Volume 21, Number 37, Rensselaer, Jasper County, 14 February 1917 — SIZES OF NESTING BOXES. [ARTICLE]

SIZES OF NESTING BOXES.

Birds differ decidedly in their requirements for nesting. In building birdhouses or providing nesting facilities, the requirements of the particular species which it is desired to attract should be considered. For those which usually excavate homes

for themselves, the diameter of the entrance and the depth and diameter of the'ravrtyTnust be in accord with their specific standards. The following table, furnished by. the United States bureau of biological survey, gives the sizes of nesting boxes* for various species of birds, together with the height above the ground they should be located.

g . ' Floor Depth . Entr Diam. Height, bpecies. c hv R 8 6 IV2 4by 4 Bto 10 8 6to la White-breasted nuthatch —4 by 4 Bto 10 8 14 12 to M House wren 4by 4 6to 8 Ito % 6to 10 Berwick wren 4by 4 6to 8 Ito 6 1 6to 10 Carolina wren 4by 4 6to 8 Ito 6 I*4 6to 10 hV b b 1 <5 1 iv a Martin-.,.—. lt 3 Song_ ’ .... , 4. g_ »toi2 House finch 6 bv 6 6 (*) Q.-- 8 to 12 Fhoebei'. 6bv 6 Bto 10 8 2 Bto 20 Crested flycatcher ? to 18 16 6to 20 Red-headed woodpecKer^. ■••.•••;p y 2 12 to 20 Golden-fronted woodpecker. - 15 12 jo to 20 ’ .4 bv 4 Bto 10 8 1% 6to 20 Downy woodpecker g b j, 3 12 to 15 12 3 10 to 30 Screech owl s b j. 8 12 to 15 12 3 16 to 30 Sparrow hawk . g by 6 io t o 12 10 2% 12 to 20 Saw-whet owl 10 by 18 15 to 18 4 6 12 to 18 Barn owl • by 18 10 l 0 15 3 6 4to 20 Wood duck .. One or more sides open. ■ ■ ’ (=) All sides open.