Tan sólo escuchadas

When I made the rules of my list at the end of December last year I gave myself a grave handicap: I could only count species which I had seen. In Amazonia, of course, many birds are to be heard and not seen; but rules are rules and such species don't count. In an idle airport moment, however, I've come up with a list of birds I heard in the Amazon and Andean forests of Peru this month but which this time I didn't see. Almost certainly there are others which will emerge when I write the report of our Peruvian trip but these are the species I can remember for now. 

Birds I heard (but didn’t see) in Peru and which therefore don’t count on this daft list of mine

little tinamou	Crypturellus soui
brown tinamou	Crypturellus obsoletus
undulated tinamou	Crypturellus undulatus
tawny-bellied screech-owl	Megascops watsonii
crested owl	Lophostrix cristata
spectacled owl	Pulsatrix perspicillata
Amazonian pygmy-owl	Glaucidium hardyi
common potoo	Nyctibius griseus
collared trogon	Trogon collaris
rufous motmot	Baryphthengus martii
striolated puffbird	Nystalus striolatus
rufous-capped nunlet	Nonnula ruficapilla
pale-legged hornero	Furnarius leucopus
chestnut-crowned foliage-gleaner	Automolus rufipileatus
warbling antbird	Hypocnemis peruviana
chestnut-tailed antbird	Myrmeciza hemimelaena
Goeldi’s antbird	Myrmeciza goeldii
black-faced antthrush	Formicarius analis
rufous antpitta	Grallaria rufula
flammulated bamboo tyrant	Hemitriccus flammulatus
forest elaenia	Myiopagis gaimardii
bright-rumped attila	Attila spadiceus
screaming piha	Lipaugus vociferans
lemon-chested greenlet	Hylophilus thoracicus
dusky-capped greenlet	Hylophilus hypoxanthus
moustached wren	Thryothorus genibarbis
scaly-breasted wren	Microcerculus marginatus
Andean solitaire	Myadestes ralloides
white-eared solitaire	Entomodestes leucotis
tit-like dacnis	Xenodacnis parina