﻿20 



BULLETIN ISSO'^ U. S. DEPAKTMENT OF AGRICULTUEE 



Table 4. — Material identified in the food of the black-necked stilt as determined from 

 the examination of 80 stomachs, and the number of stomachs in which each item 

 was found 



Animal Matter 



Crustacea (crabs, shrimps, etc.) 



Cambarus sp. (crawfishes) 



Other crustaceans 



Odonata (dragonflies) 



Dragonfly nymphs 



Ephemerida (Mayflies) 

 Ephemeridae (nymphs) 



Orthoftera (grasshoppers, etc.) 



Acridiidae (short-horned grasshoppers) 



Gryllidae (crickets) 



Heteroptera (true bugs) 



Pentatomidae (stink-bugs) 



Miridae (plant bugs) 



Gerris sp. (water-striders) 



Saldasp. (shorebugs) 



Notonecta undulata (back -swimmers) 



Other NotonectidSB (back -swimmers) 



Belostoma flumineum (giant water-bug) 



Belostomasp. (giant water-bug) 



Arctocorixa interrupta (water-boatman) 



Other Corixidse (water-boatmen) 



Other heteropterans 



Trichoptera (caddisflies) 



Caddisfly larvae 



Lepidoptera (butterflies and moths) 



Caterpillars 



CoLEOPTERA (beetles) 



Cieindela sp. (tiger beetle) 



Bembidion insulatum 



Bembidion sp 



Other Carabidse (ground beetles) 



Haliplus concolor 



Haliplus sp 



Peltodytes callosus 



Peltodytes muticus 



Other Haliplidae (crawling water-beetles) 



Coelambus pedaUs 



Coelambus sp 



Deronectes striatellus 



Coptotomus obscurus 



Thermonectes ornaticolUs 



Dytiscidse (larvae).. 



Other Dytiscidae (predacious diving beetles) . 



Helophorus sp 



Berosus pugnax 



Berosus infuscatus 



Berosus sp 



Tropisternus limbalis 



Tropisternus nimbatus 



Tropisternus californicus 



Tropisternus sp 



Cercyon sp 



Hydrophilidae (larvae) 



Other Hydrophilidae (water - scavenger 

 beetles) 



5 



Animal Matter— Continued 

 CoLEOPTERA (beetles) — Continued 



Heterocerus sp 



Heterocerus sp. (larvae) 



Hyperodessp 



OnychOis nigrirostris 



Bagous mammillatus 



Bagous obliquus 



Bagous restrictus 



Other CurcuJionidffi (weevils)- 



Sphenophorus ochreus (billbugs) 



Sphenophorus pertinax (billbugs) 



Sphenophorus sp. (billbugs) 



DiPTERA (flies) 



Limnobiinae (crane flies) Oarvae) 



Chironomidae 



Chironomidse (midges) (larvae) 



Culicidae (mosquitoes) Qarvae and pupae) 



Stratiomyia sp. (larvae) 



Odontomyia sp. (larvae) 



Other Stratiomyiidae (soldier flies, larvae)... 



Syrphidae (flower flies) (larvae) 



Ephydra gracilis (alkali flies) 



Ephydra sutopaca (alkali flies) (larvae) 



Ephydra sp. (alkali flies) (larvae) 



Other dipterous larvae 



Other dipterans 



Araneida spiders) 



Spiders 



Pelecypoda (mussels) 

 Small bivalves 



Gastropoda (snails) 



Bittium varium 



Amnicola sp 



Vivipara georgiana 



Physa gyrina 



Physasp 



Planorbis trivolvis 



Planorbis sp 



Other snails 



Pisces (fishes) 



C y prinus carpio (carp) 



Centrarchidae (sunflshes) 



Other fishes 



Amphibia (frogs, toads, etc.) 

 Frog 



Vegetable Matter 



Marsileasp (pepperwort) 



Potamogeton pectinatus (sago pondweed) 



(seeds) 



Potamogeton pectinatus (leaves) 



Potamogeton sp. (pondweed) 



Scirpus americanus (three-square) 



Scirpus paludosus (bayonet-grass) 



Scirpus sp. (bulrush) 



Cephalanthus occidentalis (buttonbush) 



Vegetable rubbish 



Table 5. 



-Percentages of ^principal groups of items in the food of the five shore- 

 birds discussed 



Bird 



Nimi- 

 ber of 

 stom- 

 achs 



Crus- 

 tacea 



Odo- 

 nata, 

 Tri- 

 chop- 

 tera, 

 Ephem- 

 erida 



Hem- 

 iptera 



Cole- 

 optera 



Dip- 



tera 



Mol- 

 lusca 



Pisces 



Mis- 

 cella- 

 neous 



Total 



animal 



food 



Vege- 

 table 

 food 



Red phalarope 



36 

 155 

 106 

 67 

 80 



33.5 

 9.3 

 3.6 



8.6 

 .5 







27.3 

 16.5 

 20.1 



n.4 



32.4 



22.7 

 32.8 

 43.1 

 23.8 

 9.7 



.3 



.8 

 7.9 



6.8 

 '"'3."2" 



9.7 

 3.9 

 1.8 

 14.5 

 2.7 



100.0 

 97.2 

 93.3 

 65.1 

 98.9 



Tr. 



Northern phalarope. . 

 Wilson phalarope 



.2 



31.8 

 24.4 

 5.9 

 35 



2.8 

 6.7 



Avocet 



.1 

 7.5 



34.9 



Black-necked stilt 



1.1 



WASHINGTON : GOVERNMENT PRINTING OFFICIO : IDl'S 



