Q 01/05

Which of North America's warblers flies nonstop over the Atlantic for up to three days each autumn?

A) Blackpoll warbler

B) Magnolia warbler

C) Mourning warbler

D) Black-throated blue warbler

Answer · why

A) Blackpoll warbler

The blackpoll warbler nearly doubles its body mass before leaving, then crosses about 2,500 km of open water to reach South America or the Greater Ant...

Q 02/05

Rare Kirtland's warblers of the Great Lakes nest almost only among young stands of which tree?

A) Balsam fir

B) Jack pine

C) Paper birch

D) Tamarack

Answer · why

B) Jack pine

Jack pine suits Kirtland's warbler only while the trees are young and dense, a habitat once renewed by wildfire and now made by harvesting old stands ...

Q 03/05

Which songbird of the warbler family builds a domed nest with a side entrance on the forest floor?

A) Northern parula

B) Painted redstart

C) Ovenbird

D) Kentucky warbler

Answer · why

C) Ovenbird

The ovenbird is named for that nest, known as the "oven", which is woven from vegetation. Nesting on the ground exposes its young to snakes, red squir...

Q 04/05

Which brood parasite's eggs do yellow warblers often bury under a fresh layer of nesting material?

A) Yellow-billed cuckoo

B) European starling

C) Common grackle

D) Brown-headed cowbird

Answer · why

D) Brown-headed cowbird

The brown-headed cowbird regularly lays in yellow warbler nests. A warbler that spots the intruder's egg usually gives up its own eggs too and lays a ...

Q 05/05

Which crop, when grown under a canopy of shade trees, gives wintering warblers valuable habitat?

A) Sugarcane

B) Pineapple

C) Coffee

D) Cotton

Answer · why

C) Coffee

Coffee grown the traditional way under shade gives farms in Chiapas, Mexico, a bird richness rivaled only by the region's natural forest, while unshad...