Laburnum in "L. anagyroides" and long in "L. alpinum". They have yellow pea-flowers in pendulous leafless racemes long in spring, which makes them very popular garden trees. In "L. anagyroides", the racemes are long, with densely packed flowers; in "L. alpinum" the racemes are long, but with the flowers sparsely along the raceme. The fruit develops as a pod and is extremely poisonous. The yellow flowers are responsible for the old poetic name 'golden chain tree' (also spelled golden chaintree or goldenchain tree). All parts of the plant are poisonous, although mortality is very rare. Symptoms of laburnum poisoning may include
Tree swallow as "Hirundo bicolor" by Louis Pierre Vieillot in his "Histoire naturelle des oiseaux de l'Amérique Septentrionale", published in 1807. The genus it is currently placed in, "Tachycineta", was established by Jean Cabanis in 1850. This swallow is sometimes placed in the genus "Iridoprocne", along with the mangrove swallow, white-rumped swallow, white-winged swallow, and Chilean swallow. The placement was first made by Elliott Coues, on the basis of its plumage. The tree swallow is also called the white-bellied swallow, for its white underparts. The generally accepted genus name is from Ancient Greek "takhykinetos", "moving quickly", and the specific "bicolor" is Latin