Insects, birds and lizards as pollinators of the largest-flowered Scrophularia of Europe and Macaronesia

How many flowering plants are pollinated by animals?

(2011) Jeff Ollerton et al.   OIKOS

Hovering sunbirds in the Old World: occasional behaviour or evolutionary trend?

(2010) Štěpán Janeček et al.   OIKOS

A global test of the pollination syndrome hypothesis

(2009) Jeff Ollerton et al.   ANNALS OF BOTANY

African sunbirds hover to pollinate an invasive hummingbird-pollinated plant

(2009) Sjirk Geerts et al.   OIKOS

Opportunistic nectar-feeding birds are effective pollinators of bird-flowers from Canary Islands: experimental evidence from Isoplexis canariensis (Scrophulariaceae)

(2008) M. C. Rodriguez-Rodriguez et al.   AMERICAN JOURNAL OF BOTANY

Nectar consumption of warblers after long-distance flights during spring migration

(2008) REGINE SCHWILCH et al.   IBIS

Nectar-feeding bird and bat niches in two worlds: pantropical comparisons of vertebrate pollination systems

(2008) Theodore H. Fleming et al.   JOURNAL OF BIOGEOGRAPHY

Bird pollination of Canary Island endemic plants

(2008) Jeff Ollerton et al.   NATURWISSENSCHAFTEN