HIRDS 





A pair of house uicns werr ohscivi'd to Iced tlicir w>{ ol' tivi* yoiiii;,' 



five days old — 2W insects, most of tlieiii lurq;e cal)!)!!!!:*' rat<T]>illars; 



time, 4.24 A.M. to 7.^}8 p.m. 



A pair of orchard oriides, from 4.:{() a. at. to (i.lo r.M., wen- ohsrrvcd 

 to feed the nest, containing;- two nearly t'iill-lh*d,t>('d yoim.n. '»•' tinn-s, 

 prohahly several insects at a feeding. 



.V [lair (»f jtlioebes, from 1.2(1 a.m. \<> T.l'J I'.m.. fed two young 'J«i'i 

 times. A vonng ])h(el>e just out of tin- m-st rfi|iiin'd as liigli as '2i^*^ 

 good-sized grasshoi)i)ers \h'v day.' 



A vonng rohin ahont three weeks ohl ate 7'> large cutworms on on«- 

 day, and two and a half ounces of earthworms the next. A y<»ung scar- 

 let tanager ate 150 cabbage caterinllars. liesides otlier food, in a .lay. 

 A cuckoo on 

 the tenth day 

 ate 42 grass- 

 hoppers, no 

 woolly cater- 

 jiillars, and:)l> 

 cal)bage cat- 

 erpillars. On 

 the twentieth 

 day the same 

 bird consumed 

 ()2 woolly cat- 

 erpillars^ 12:} 



cabbagecater- ^,^^ ,^^ Bobwliite chick tliree weeks old. Usual occupation 



l>i liars, and 4:} ^, , , ., ., 



^ , Photdiiraph l»v the author 



grasshoppers, 



amountinu- to tiiree ounces of food. An adult cuckoo ate 22.') cal»ltage 

 caterpillars, or 1 .")() large woolly caterpillars, amounting to about five 

 ounces of food daily. (From feeding t»\sts by Andrew .1. ricjinou.) 



From sucli actual data as these we learn that the estimates given 

 above are conservative. Much more accurate ..bservation is rcpiired. 

 however, before entirely reliable estiuuites can be made. 



Outdoor laboratory work. '1 bis siiouhl extt'iid tbr«)ii<;lH>ui 

 the year, and also to coiiibhR' i)i(>l)li'ins irciuirini;- conlimums 



lAll the above data are taken from reports of students of the huliana 

 University Summer School, Winona Lake, Indiana, for 100.-> and l'.>0«5 

 (O. P. Dcllingcr in charge of clas.s). 



